Known (probable) primes of form (x^n-y^n)/(x-y), x = 5 .. 999 inclusive small n's up to x = 50 and each possible y
x = 5
y = 2
n = 2 1 digits Prime
n = 5 4 digits Prime
n = 7 5 digits Prime
n = 13 9 digits Prime
n = 19 13 digits Prime
n = 37 26 digits Prime
n = 59 41 digits Prime
n = 67 47 digits Prime
n = 79 55 digits Prime
n = 307 215 digits Prime
n = 331 231 digits Prime
n = 599 419 digits Prime
n = 1301 909 digits Prime
n = 12263 8571 digits PRP Robert Price
n = 12589 8799 digits PRP Robert Price
n = 18443 12891 digits Jul 2004 PRP Hugo Pfoertner
n = 20149 14084 digits Apr 2012 PRP Robert Price
n = 27983 19559 digits Apr 2012 PRP Robert Price
n = 281807 196975 digits Aug 2023 PRP Jon Grantham
n = 656657 458984 digits Aug 2023 PRP Jon Grantham
n = 795829 556261 digits Aug 2023 PRP Jon Grantham
n = 832151 581649 digits Aug 2023 PRP Jon Grantham
y = 3
n = 13 9 digits Prime
n = 19 13 digits Prime
n = 23 16 digits Prime
n = 31 22 digits Prime
n = 47 33 digits Prime
n = 127 89 digits Prime
n = 223 156 digits Prime
n = 281 197 digits Prime
n = 2083 1456 digits Oct 2006 Prime Farideh Firoozbakht
n = 5281 3691 digits Oct 2006 Prime Farideh Firoozbakht
n = 7411 5180 digits Oct 2006 Prime Farideh Firoozbakht
n = 7433 5196 digits Oct 2006 Prime Farideh Firoozbakht
n = 19051 13316 digits Oct 2007 PRP Lelio R Paula
n = 27239 19039 digits Jan 2009 PRP Lelio R Paula
n = 35863 25067 digits Feb 2009 PRP Lelio R Paula
n = 70327 49157 digits Aug 2011 PRP Robert Price
n = 128941 90126 digits May 2022 PRP Kellen Shenton
n = 147571 103148 digits May 2022 PRP Kellen Shenton
n = 182099 127282 digits May 2022 PRP Kellen Shenton
n = 866029 605328 digits Aug 2023 PRP Jon Grantham
x = 7
y = 2
n = 3 2 digits Prime
n = 7 6 digits Prime
n = 19 16 digits Prime
n = 79 67 digits Prime
n = 431 364 digits Prime
n = 1373 1160 digits Prime
n = 1801 1522 digits Prime
n = 2897 2448 digits Prime
n = 46997 39717 digits Aug 2012 PRP Robert Price
n = 341063 288231 digits Aug 2023 PRP Jon Grantham
n = 508867 430042 digits Aug 2023 PRP Jon Grantham
n = 720497 608890 digits Aug 2023 PRP Jon Grantham
n = 846913 715724 digits Aug 2023 PRP Jon Grantham
y = 3
n = 3 2 digits Prime
n = 7 6 digits Prime
n = 19 16 digits Prime
n = 109 92 digits Prime
n = 131 111 digits Prime
n = 607 513 digits Prime
n = 863 729 digits Prime
n = 2917 2465 digits Apr 2007 Prime Farideh Firoozbakht
n = 5923 5005 digits Apr 2007 Prime Farideh Firoozbakht
n = 12421 10497 digits Jun 2011 PRP Robert Price
n = 187507 158462 digits Aug 2023 PRP Jon Grantham
n = 353501 298743 digits Aug 2023 PRP Jon Grantham
n = 817519 690884 digits Aug 2023 PRP Jon Grantham
y = 4
n = 2 2 digits Prime
n = 5 4 digits Prime
n = 11 9 digits Prime
n = 61 52 digits Prime
n = 619 523 digits Prime
n = 2879 2433 digits Prime
n = 2957 2499 digits Prime
n = 24371 20596 digits Jun 2012 PRP Robert Price
n = 69247 58521 digits Jun 2012 PRP Robert Price
n = 376463 318148 digits Jul 2023 PRP Jon Grantham
n = 571199 482719 digits Jul 2023 PRP Jon Grantham
n = 624803 528020 digits Jul 2023 PRP Jon Grantham
y = 5
n = 3 3 digits Prime
n = 5 4 digits Prime
n = 7 6 digits Prime
n = 113 96 digits Prime
n = 397 336 digits Prime
n = 577 488 digits Prime
n = 7573 6400 digits May 2012 Prime Robert Price
n = 14561 12306 digits Oct 2007 PRP Lelio R Paula
n = 58543 49475 digits May 2012 PRP Robert Price
n = 100019 84526 digits Aug 2023 PRP Jon Grantham
n = 123407 104291 digits Aug 2023 PRP Jon Grantham
n = 136559 115406 digits Aug 2023 PRP Jon Grantham
n = 208283 176020 digits Aug 2023 PRP Jon Grantham
n = 210761 178114 digits Aug 2023 PRP Jon Grantham
n = 457871 386946 digits Aug 2023 PRP Jon Grantham
n = 608347 514113 digits Aug 2023 PRP Jon Grantham
n = 636043 537519 digits Aug 2023 PRP Jon Grantham
x = 8
y = 3
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 7 6 digits Prime
n = 19 17 digits Prime
n = 31 28 digits Prime
n = 67 60 digits Prime
n = 89 80 digits Prime
n = 9227 8333 digits Apr 2007 PRP Farideh Firoozbakht
n = 43891 39637 digits Jul 2011 PRP Robert Price
n = 854149 771373 digits Aug 2023 PRP Jon Grantham
y = 5
n = 2 2 digits Prime
n = 19 17 digits Prime
n = 1021 922 digits Prime
n = 5077 4585 digits Dec 2012 Prime Robert Price
n = 34031 30733 digits Dec 2012 PRP Robert Price
n = 46099 41632 digits Dec 2012 PRP Robert Price
n = 65707 59339 digits Dec 2012 PRP Robert Price
n = 347437 313767 digits Aug 2023 PRP Jon Grantham
x = 9
y = 2
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 5 4 digits Prime
n = 13 12 digits Prime
n = 29 27 digits Prime
n = 37 35 digits Prime
n = 1021 974 digits Prime
n = 1399 1335 digits Prime
n = 2137 2039 digits Prime
n = 4493 4287 digits Prime
n = 5521 5268 digits Prime
n = 108553 103586 digits Jul 2023 PRP Jon Grantham
n = 200807 191618 digits Jul 2023 PRP Jon Grantham
y = 4
n = 2 2 digits Prime
y = 5
n = 3 3 digits Prime
n = 11 10 digits Prime
n = 17 16 digits Prime
n = 173 165 digits Prime
n = 839 801 digits Prime
n = 971 926 digits Prime
n = 40867 38997 digits Jan 2013 PRP Robert Price
n = 45821 43724 digits Jan 2013 PRP Robert Price
n = 147503 140754 digits Jul 2023 PRP Jon Grantham
y = 7
n = 3 3 digits Prime
n = 5 5 digits Prime
n = 7 7 digits Prime
n = 4703 4488 digits Mar 2017 Prime Ray Chandler
n = 30113 28735 digits Nov 2014 PRP Richard Fischer
n = 835391 797166 digits Jul 2023 PRP Jon Grantham
x = 10
y = 3
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 5 5 digits Prime
n = 37 37 digits Prime
n = 599 599 digits Prime
n = 38393 38393 digits Jun 2011 PRP Robert Price
n = 51431 51431 digits Jun 2011 PRP Robert Price
n = 118681 118681 digits Aug 2023 PRP Jon Grantham
n = 376417 376417 digits Aug 2023 PRP Jon Grantham
y = 7
n = 2 2 digits Prime
n = 31 31 digits Prime
n = 103 103 digits Prime
n = 617 617 digits May 2016 Prime Tim Johannes Ohrtmann
n = 10253 10253 digits May 2016 PRP Tim Johannes Ohrtmann
n = 10691 10691 digits May 2016 PRP Tim Johannes Ohrtmann
n = 35353 35353 digits May 2018 PRP Eric Chen
n = 129587 129587 digits Jul 2023 PRP Jon Grantham
n = 556441 556441 digits Jul 2023 PRP Jon Grantham
x = 11
y = 2
n = 2 2 digits Prime
n = 5 5 digits Prime
n = 11 11 digits Prime
n = 13 13 digits Prime
n = 331 344 digits Prime
n = 599 623 digits Prime
n = 18839 19618 digits Jan 2013 PRP Robert Price
n = 23747 24729 digits Jan 2013 PRP Robert Price
n = 24371 25379 digits Jan 2013 PRP Robert Price
n = 29339 30553 digits Jan 2013 PRP Robert Price
n = 32141 33471 digits Jan 2013 PRP Robert Price
n = 67421 70211 digits Jan 2013 PRP Robert Price
y = 3
n = 3 3 digits Prime
n = 5 5 digits Prime
n = 19 19 digits Prime
n = 31 32 digits Prime
n = 367 382 digits Prime
n = 389 405 digits Prime
n = 431 448 digits Prime
n = 2179 2269 digits Mar 2007 Prime Ryan S. Propper
n = 10667 11108 digits Apr 2011 PRP Robert Price
n = 13103 13645 digits Apr 2011 PRP Robert Price
n = 90397 94138 digits Apr 2011 PRP Robert Price
y = 4
n = 3 3 digits Prime
n = 5 5 digits Prime
n = 11 11 digits Prime
n = 17 17 digits Prime
n = 71 74 digits Prime
n = 89 92 digits Prime
n = 827 861 digits Prime
n = 22307 23230 digits Mar 2013 PRP Robert Price
n = 45893 47792 digits Mar 2013 PRP Robert Price
n = 63521 66150 digits Mar 2013 PRP Robert Price
y = 5
n = 5 5 digits Prime
n = 41 42 digits Prime
n = 149 155 digits Prime
n = 229 238 digits Prime
n = 263 274 digits Prime
n = 739 769 digits Prime
n = 3457 3600 digits Jan 2013 Prime Robert Price
n = 20269 21108 digits Jan 2013 PRP Robert Price
n = 98221 102286 digits Jan 2013 PRP Robert Price
y = 6
n = 2 2 digits May 2016 Prime Tim Johannes Ohrtmann
n = 3 3 digits May 2016 Prime Tim Johannes Ohrtmann
n = 11 11 digits May 2016 Prime Tim Johannes Ohrtmann
n = 163 170 digits May 2016 Prime Tim Johannes Ohrtmann
n = 191 199 digits May 2016 Prime Tim Johannes Ohrtmann
n = 269 280 digits May 2016 Prime Tim Johannes Ohrtmann
n = 1381 1438 digits May 2016 Prime Tim Johannes Ohrtmann
n = 1493 1555 digits May 2016 Prime Tim Johannes Ohrtmann
n = 38453 40044 digits May 2018 PRP Eric Chen
y = 7
n = 5 5 digits Prime
n = 19 20 digits Prime
n = 67 70 digits Prime
n = 107 111 digits Prime
n = 593 617 digits May 2016 Prime Tim Johannes Ohrtmann
n = 757 788 digits May 2016 Prime Tim Johannes Ohrtmann
n = 1801 1875 digits May 2016 Prime Tim Johannes Ohrtmann
n = 2243 2336 digits May 2016 Prime Tim Johannes Ohrtmann
n = 2383 2482 digits May 2016 Prime Tim Johannes Ohrtmann
n = 6043 6293 digits May 2016 Prime Tim Johannes Ohrtmann
n = 10181 10602 digits May 2016 PRP Tim Johannes Ohrtmann
n = 11383 11854 digits May 2016 PRP Tim Johannes Ohrtmann
n = 15629 16276 digits May 2016 PRP Tim Johannes Ohrtmann
y = 8
n = 2 2 digits Prime
n = 7 7 digits Prime
n = 11 11 digits Prime
n = 17 18 digits Prime
n = 37 39 digits Prime
n = 521 543 digits May 2016 Prime Tim Johannes Ohrtmann
n = 877 913 digits May 2016 Prime Tim Johannes Ohrtmann
n = 2423 2523 digits May 2016 Prime Tim Johannes Ohrtmann
y = 9
n = 5 5 digits Prime
n = 31 32 digits Prime
n = 271 282 digits Prime
n = 929 968 digits May 2016 Prime Tim Johannes Ohrtmann
n = 2789 2905 digits May 2016 Prime Tim Johannes Ohrtmann
n = 4153 4325 digits May 2016 Prime Tim Johannes Ohrtmann
x = 12
y = 5
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 31 33 digits Prime
n = 41 44 digits Prime
n = 53 57 digits Prime
n = 101 109 digits Prime
n = 421 454 digits Prime
n = 1259 1358 digits Jul 2012 Prime Ray G. Opao
n = 4721 5094 digits Jul 2012 Prime Ray G. Opao
n = 45259 48842 digits Mar 2013 PRP Robert Price
y = 7
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 7 7 digits Prime
n = 13 14 digits Prime
n = 47 51 digits Prime
n = 89 96 digits Prime
n = 139 150 digits Prime
n = 523 564 digits May 2016 Prime Tim Johannes Ohrtmann
n = 1051 1134 digits May 2016 Prime Tim Johannes Ohrtmann
x = 13
y = 2
n = 3 3 digits Prime
n = 5 5 digits Prime
n = 31 34 digits Prime
n = 73 81 digits Prime
n = 89 99 digits Prime
n = 521 580 digits Prime
n = 3943 4392 digits Prime
n = 8719 9712 digits PRP Robert Price
y = 3
n = 7 7 digits Prime
n = 31 34 digits Prime
n = 41 45 digits Prime
n = 269 299 digits Prime
n = 283 315 digits Prime
n = 7333 8168 digits PRP Robert Price
n = 8803 9806 digits Aug 2011 PRP Robert Price
y = 4
n = 2 2 digits Prime
n = 5 5 digits Prime
n = 19 21 digits Prime
n = 109 121 digits Prime
n = 157 174 digits Prime
n = 8521 9491 digits PRP Robert Price
n = 26017 28981 digits Apr 2013 PRP Robert Price
n = 26177 29159 digits Apr 2013 PRP Robert Price
y = 5
n = 5 5 digits Prime
n = 19 21 digits Prime
n = 71 79 digits Prime
n = 197 219 digits Prime
n = 659 734 digits Prime
n = 22079 24594 digits Mar 2013 PRP Robert Price
n = 61949 69007 digits Mar 2013 PRP Robert Price
y = 6
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 19 21 digits Prime
n = 71 79 digits Prime
n = 127 141 digits Prime
n = 3833 4269 digits Jan 2022 PRP
n = 12421 13836 digits May 2026 PRP
y = 7
n = 7 8 digits Prime
n = 23 25 digits Prime
n = 43 48 digits Prime
n = 83 92 digits Prime
n = 167 186 digits Prime
n = 223 248 digits Prime
n = 733 816 digits Prime
n = 2027 2258 digits Apr 2022 Prime Kevin Thompson
y = 8
n = 3 3 digits Prime
n = 13 14 digits Prime
n = 61 68 digits Prime
n = 67 74 digits Prime
n = 313 348 digits Prime
n = 491 547 digits Mar 2018 Prime Ben Chaffin
n = 1657 1846 digits Apr 2022 Prime
n = 4093 4559 digits Jan 2022 PRP
y = 9
n = 3 3 digits Prime
n = 29 32 digits Prime
n = 31 34 digits Prime
n = 61 68 digits Prime
n = 73 81 digits Prime
n = 211 235 digits Prime
n = 409 456 digits Mar 2018 Prime Ben Chaffin
n = 541 603 digits Sep 2021 Prime
n = 1979 2204 digits Aug 2022 Prime
n = 2423 2699 digits Nov 2022 Prime
n = 4007 4463 digits Jun 2026 PRP Norman Luhn
n = 13759 15327 digits Jun 2026 PRP
n = 19213 21402 digits Jun 2026 PRP
y = 10
n = 2 2 digits Prime
n = 251 280 digits Prime
n = 457 509 digits Mar 2018 Prime Ben Chaffin
n = 811 903 digits Mar 2018 Prime Ben Chaffin
n = 1709 1904 digits Mar 2022 Prime
n = 6217 6925 digits Jun 2026 PRP
y = 11
n = 3 4 digits Prime
n = 11 12 digits Prime
n = 19 21 digits Prime
n = 43 48 digits Prime
n = 239 266 digits Prime
n = 353 393 digits Prime
n = 397 442 digits Prime
n = 599 667 digits Prime
n = 1109 1236 digits Prime
n = 2099 2338 digits Prime
x = 14
y = 3
n = 2 2 digits Prime
n = 5 5 digits Prime
n = 13 14 digits Prime
n = 67 76 digits Prime
n = 2657 3045 digits Prime
n = 3547 4065 digits Prime
n = 15649 17935 digits Sep 2011 PRP Robert Price
y = 5
n = 2 2 digits Prime
n = 151 173 digits Prime
n = 673 771 digits Prime
n = 709 812 digits Prime
n = 2999 3437 digits May 2008 Prime Herman Jamke
n = 17909 20526 digits Apr 2013 PRP Robert Price
n = 77213 88496 digits Apr 2013 PRP Robert Price
y = 9
n = 2 2 digits Prime
n = 59 67 digits Prime
n = 61 70 digits Prime
n = 167 191 digits Prime
n = 1783 2043 digits Prime
n = 47303 54215 digits May 2024 PRP Aurel Gibier
y = 11
n = 5 6 digits Prime
n = 79 91 digits Prime
n = 8209 9409 digits May 2024 PRP
x = 15
y = 2
n = 2 2 digits Prime
n = 5 5 digits Prime
n = 11 12 digits Prime
n = 167 196 digits Prime
n = 317 372 digits Prime
n = 337 396 digits Prime
n = 349 410 digits Prime
n = 3449 4056 digits Prime
n = 7517 8840 digits PRP Robert Price
n = 23003 27053 digits May 2013 PRP Robert Price
y = 4
n = 2 2 digits Prime
n = 1097 1290 digits Prime
n = 2243 2637 digits Prime
n = 2857 3360 digits Prime
n = 4357 5124 digits Prime
n = 6803 8000 digits Prime
n = 20747 24400 digits May 2014 PRP Robert Price
n = 24571 28897 digits May 2014 PRP Robert Price
y = 7
n = 3 3 digits Prime
n = 5 5 digits Prime
n = 19 22 digits Prime
n = 89 104 digits Prime
n = 107 125 digits Prime
n = 109 128 digits Prime
n = 157 184 digits Prime
n = 223 262 digits Prime
n = 389 457 digits Prime
n = 967 1137 digits Prime
n = 1669 1962 digits Prime
y = 8
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 1123 1320 digits Prime
n = 9091 10692 digits Jun 2026 PRP Norman Luhn
y = 11
n = 7 8 digits Prime
n = 13 15 digits Prime
n = 17 20 digits Prime
n = 37 43 digits Prime
y = 13
n = 17 20 digits Prime
n = 383 451 digits Prime
n = 421 495 digits Prime
n = 1049 1234 digits Prime
n = 7411 8716 digits PRP
x = 16
y = 3
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 31 37 digits Prime
n = 467 562 digits Prime
n = 1747 2103 digits Apr 2007 Prime Farideh Firoozbakht
n = 29683 35741 digits Sep 2011 PRP Robert Price
y = 5
n = 7 8 digits Prime
n = 13 15 digits Prime
n = 109 131 digits Prime
n = 139 167 digits Prime
n = 967 1164 digits Prime
n = 60013 72262 digits Jul 2013 PRP Robert Price
n = 97613 117537 digits Jul 2013 PRP Robert Price
y = 7
n = 2 2 digits Prime
n = 5 6 digits Prime
n = 79 95 digits Prime
n = 241 290 digits Prime
n = 1187 1429 digits Prime
n = 2749 3310 digits Prime
n = 3037 3656 digits PRP
n = 9791 11789 digits Jun 2026 PRP Norman Luhn
y = 11
n = 13 15 digits Prime
n = 17 20 digits Prime
n = 47 56 digits Prime
n = 613 738 digits Prime
n = 1187 1429 digits Prime
n = 1613 1942 digits Prime
n = 4261 5131 digits PRP
y = 13
n = 2 2 digits Prime
n = 41 49 digits Prime
n = 73 88 digits Prime
n = 101 122 digits Prime
n = 3917 4717 digits PRP
x = 17
y = 2
n = 2 2 digits Prime
n = 83 101 digits Prime
n = 1907 2346 digits Prime
n = 2591 3187 digits Prime
n = 16223 19961 digits Jul 2013 PRP Robert Price
n = 17183 21142 digits Jul 2013 PRP Robert Price
y = 3
n = 3 3 digits Prime
n = 11 13 digits Prime
n = 17 20 digits Prime
n = 491 604 digits Prime
n = 23029 28335 digits Nov 2011 PRP Robert Price
y = 4
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 7 8 digits Prime
n = 11 13 digits Prime
n = 31 38 digits Prime
n = 101 124 digits Prime
n = 887 1091 digits Prime
n = 4861 5981 digits Prime
y = 5
n = 5 6 digits Prime
n = 7 8 digits Prime
n = 17 20 digits Prime
n = 23 28 digits Prime
n = 43 52 digits Prime
n = 71 87 digits Prime
n = 239 293 digits Prime
n = 733 901 digits Prime
n = 1097 1349 digits Prime
y = 6
n = 2 2 digits Prime
n = 29 35 digits Prime
n = 101 124 digits Prime
n = 2731 3360 digits Prime
y = 7
n = 3 3 digits Prime
n = 67 82 digits Prime
n = 89 109 digits Prime
n = 4027 4955 digits PRP
y = 8
n = 7 8 digits Prime
n = 11 13 digits Prime
n = 29 35 digits Prime
n = 569 700 digits Prime
y = 9
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 19 23 digits Prime
n = 401 493 digits Prime
n = 751 924 digits Prime
n = 1229 1512 digits Prime
n = 4723 5811 digits PRP
n = 9109 11208 digits Jun 2026 PRP Norman Luhn
y = 10
n = 23 28 digits Prime
n = 59 72 digits Prime
n = 223 274 digits Prime
n = 479 589 digits Prime
n = 719 884 digits Prime
n = 983 1209 digits Prime
n = 2477 3047 digits Prime
n = 2593 3190 digits Prime
n = 7243 8912 digits Jun 2026 PRP Norman Luhn
y = 11
n = 5 6 digits Prime
n = 19 23 digits Prime
y = 12
n = 2 2 digits Prime
n = 19 23 digits Prime
n = 2269 2792 digits Prime
y = 13
n = 487 599 digits Prime
n = 1163 1431 digits Prime
y = 14
n = 2 2 digits Prime
n = 139 171 digits Prime
n = 157 193 digits Prime
n = 271 333 digits Prime
n = 9829 12094 digits Jun 2026 PRP Norman Luhn
y = 15
n = 3 4 digits Prime
n = 5 6 digits Prime
n = 47 58 digits Prime
n = 293 361 digits Prime
n = 2887 3553 digits Prime
n = 3251 4000 digits Prime
x = 18
y = 5
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 19 23 digits Prime
n = 23 28 digits Prime
n = 31 38 digits Prime
n = 37 46 digits Prime
n = 251 314 digits Prime
n = 283 355 digits Prime
n = 977 1226 digits Prime
n = 28687 36009 digits Aug 2013 PRP Robert Price
n = 32993 41415 digits Aug 2013 PRP Robert Price
y = 7
n = 3 3 digits Prime
n = 2011 2524 digits Prime
n = 6043 7585 digits Jun 2026 PRP Norman Luhn
y = 11
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 11 13 digits Prime
n = 41 51 digits Prime
n = 8713 10937 digits Jun 2026 PRP Norman Luhn
y = 13
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 9 digits Prime
n = 19 24 digits Prime
n = 53 66 digits Prime
n = 89 112 digits Prime
n = 191 240 digits Prime
n = 331 415 digits Prime
n = 1613 2025 digits Prime
n = 1907 2394 digits Prime
n = 6353 7975 digits Jun 2026 PRP Norman Luhn
x = 19
y = 2
n = 11 13 digits Prime
n = 19 24 digits Prime
n = 79 100 digits Prime
n = 631 806 digits Prime
n = 1787 2284 digits Prime
n = 2011 2571 digits Prime
n = 2381 3044 digits Prime
n = 20219 25854 digits Sep 2013 PRP Robert Price
n = 49523 63327 digits Sep 2013 PRP Robert Price
y = 3
n = 73 93 digits Prime
n = 271 346 digits Prime
n = 421 538 digits Prime
n = 2711 3466 digits Apr 2007 Prime Farideh Firoozbakht
y = 4
n = 2 2 digits Prime
n = 7 8 digits Prime
n = 11 13 digits Prime
n = 31 39 digits Prime
n = 47 59 digits Prime
n = 139 177 digits Prime
n = 263 336 digits Prime
n = 769 983 digits Prime
n = 20551 26279 digits Aug 2013 PRP Robert Price
n = 21491 27481 digits Aug 2013 PRP Robert Price
n = 112247 143536 digits Mar 2021 PRP Robert Price
y = 5
n = 5 6 digits Prime
n = 17 21 digits Prime
n = 31 39 digits Prime
n = 59 75 digits Prime
n = 373 476 digits Prime
n = 643 822 digits Prime
n = 2843 3635 digits Jul 2013 Prime Robert Price
n = 5209 6660 digits Jul 2013 Prime Robert Price
n = 85009 108705 digits Jul 2013 PRP Robert Price
y = 6
n = 19 24 digits Prime
n = 73 93 digits Prime
n = 1093 1397 digits Prime
n = 1619 2070 digits Prime
y = 7
n = 7 8 digits Prime
n = 229 292 digits Prime
n = 1789 2287 digits Prime
n = 2657 3397 digits Prime
n = 2861 3658 digits PRP
y = 8
n = 3 3 digits Prime
n = 13 16 digits Prime
n = 19 24 digits Prime
n = 23 29 digits Prime
n = 113 144 digits Prime
n = 151 193 digits Prime
n = 641 819 digits Prime
n = 2749 3515 digits PRP
n = 3803 4863 digits PRP
y = 9
n = 3 3 digits Prime
n = 7 8 digits Prime
n = 11 14 digits Prime
n = 17 21 digits Prime
n = 2657 3397 digits Prime
n = 9041 11561 digits Jun 2026 PRP Norman Luhn
y = 10
n = 2 2 digits Prime
n = 17 21 digits Prime
n = 2273 2906 digits Prime
n = 3889 4973 digits PRP
y = 11
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 41 52 digits Prime
n = 1087 1390 digits Prime
y = 12
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 17 21 digits Prime
n = 19 24 digits Prime
n = 47 60 digits Prime
n = 97 124 digits Prime
n = 109 139 digits Prime
n = 223 285 digits Prime
n = 337 431 digits Prime
n = 389 497 digits Prime
n = 2447 3129 digits Prime
n = 2621 3351 digits Prime
n = 3407 4356 digits PRP
n = 8929 11418 digits Jun 2026 PRP Norman Luhn
y = 13
n = 7 9 digits Prime
n = 11 14 digits Prime
n = 137 175 digits Prime
n = 367 469 digits Prime
n = 947 1211 digits Prime
n = 3229 4129 digits PRP
n = 4957 6339 digits PRP
n = 6959 8899 digits Jun 2026 PRP Norman Luhn
y = 14
n = 3 4 digits Prime
y = 15
n = 5 6 digits Prime
n = 7 9 digits Prime
n = 17 22 digits Prime
n = 31 40 digits Prime
n = 79 101 digits Prime
n = 523 669 digits Prime
n = 4799 6137 digits PRP
y = 16
n = 5 6 digits Prime
n = 47 60 digits Prime
n = 241 308 digits Prime
n = 1693 2165 digits Prime
y = 17
n = 163 209 digits Prime
n = 4649 5945 digits PRP
x = 20
y = 3
n = 2 2 digits Prime
n = 43 55 digits Prime
n = 1723 2241 digits Prime
n = 2971 3865 digits PRP Robert Price
n = 3257 4237 digits Prime
n = 12263 15954 digits PRP Robert Price
n = 38933 50652 digits Jan 2025 PRP Robert Price
y = 7
n = 5 6 digits Prime
n = 19 24 digits Prime
n = 653 849 digits Prime
n = 5273 6860 digits Jun 2026 PRP Norman Luhn
n = 7537 9805 digits Jun 2026 PRP Norman Luhn
y = 9
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 7 9 digits Prime
n = 17 22 digits Prime
n = 41 53 digits Prime
n = 197 256 digits Prime
n = 709 922 digits Prime
n = 5393 7016 digits Jun 2026 PRP Norman Luhn
y = 11
n = 2 2 digits Prime
n = 5 6 digits Prime
n = 31 40 digits Prime
n = 41 53 digits Prime
n = 53 69 digits Prime
n = 263 342 digits Prime
n = 311 404 digits Prime
y = 13
n = 3 4 digits Prime
n = 239 311 digits Prime
n = 983 1279 digits Prime
n = 1051 1367 digits Prime
y = 17
n = 2 3 digits Prime
n = 5 7 digits Prime
n = 7 9 digits Prime
n = 17 22 digits Prime
n = 569 740 digits Prime
x = 21
y = 2
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 353 466 digits Prime Robert Price
n = 751 992 digits Prime Robert Price
n = 9587 12675 digits PRP Robert Price
y = 4
n = 3 3 digits Prime
n = 19 24 digits Prime
n = 463 611 digits Prime Robert Price
n = 13681 18089 digits PRP Robert Price
y = 5
n = 3 3 digits Prime
n = 73 96 digits Prime
n = 89 117 digits Prime
n = 97 128 digits Prime
n = 23581 31179 digits PRP Robert Price
y = 8
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 7 9 digits Prime
n = 11 14 digits Prime
n = 17 22 digits Prime
n = 41 54 digits Prime
n = 67 88 digits Prime
n = 149 196 digits Prime
n = 211 278 digits Prime
n = 1091 1442 digits Prime
n = 5009 6622 digits Jun 2026 PRP Norman Luhn
y = 10
n = 2 2 digits Prime
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 5 6 digits Prime
n = 7 9 digits Prime
n = 7 9 digits Prime
n = 19 25 digits Prime
n = 19 25 digits Prime
n = 107 141 digits Prime
n = 269 355 digits Prime
n = 283 374 digits Prime
y = 11
n = 31 40 digits Prime
n = 131 173 digits Prime
n = 401 530 digits Prime
y = 13
n = 3 4 digits Prime
n = 3 4 digits Prime
n = 7 9 digits Prime
n = 7 9 digits Prime
n = 11 14 digits Prime
n = 11 14 digits Prime
n = 17 22 digits Prime
n = 17 22 digits Prime
n = 643 850 digits Prime
n = 4259 5631 digits Jan 2022 PRP
n = 8719 11528 digits Sep 2019 PRP
y = 16
n = 2 2 digits Prime
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 3 4 digits Prime
n = 13 17 digits Prime
n = 13 17 digits Prime
n = 43 57 digits Prime
n = 97 128 digits Prime
n = 197 260 digits Prime
n = 727 961 digits Prime
n = 1553 2053 digits May 2022 Prime Kevin Thompson
n = 4751 6282 digits Jan 2022 PRP
y = 17
n = 3 4 digits Prime
n = 31 41 digits Prime
n = 47 62 digits Prime
n = 97 128 digits Prime
n = 401 530 digits Prime
n = 503 665 digits Prime
n = 617 816 digits Prime
n = 1549 2048 digits Prime
n = 3343 4420 digits Jan 2022 PRP
n = 6529 8633 digits Jun 2026 PRP Norman Luhn
n = 7333 9696 digits Jun 2026 PRP Norman Luhn
y = 19
n = 3 4 digits Prime
n = 3 4 digits Prime
n = 17 23 digits Prime
n = 17 23 digits Prime
n = 59 78 digits Prime
n = 239 316 digits Prime
n = 743 983 digits Prime
n = 6029 7972 digits PRP
n = 9623 12724 digits PRP
x = 22
y = 3
n = 5 6 digits Prime
n = 31 41 digits Prime
n = 823 1104 digits Prime Robert Price
n = 15287 20521 digits PRP Robert Price
n = 26293 35296 digits PRP Robert Price
n = 32083 43068 digits PRP Robert Price
n = 51263 68816 digits Feb 2025 PRP Robert Price
n = 92791 124564 digits Feb 2025 PRP Robert Price
y = 5
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 661 887 digits Prime Robert Price
n = 2797 3754 digits PRP Robert Price
n = 3541 4753 digits PRP Robert Price
n = 3613 4849 digits PRP Robert Price
n = 19819 26605 digits PRP Robert Price
n = 55373 74333 digits Jun 2026 PRP Robert Price
y = 7
n = 2 2 digits Prime
n = 43 57 digits Prime
n = 59 79 digits Prime
n = 73 97 digits Prime
n = 131 175 digits Prime
n = 1487 1996 digits Jun 2026 Prime Norman Luhn
n = 2383 3198 digits Jun 2026 PRP Norman Luhn
n = 2953 3963 digits Jun 2026 PRP Norman Luhn
y = 9
n = 2 2 digits Prime
n = 5 6 digits Prime
y = 13
n = 17 22 digits Prime
y = 15
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 13 17 digits Prime
y = 19
n = 2 3 digits Prime
n = 7 9 digits Prime
n = 13 17 digits Prime
x = 23
y = 2
n = 5 6 digits Prime
n = 11 14 digits Prime
n = 197 267 digits Prime
n = 4159 5663 digits PRP Robert Price
y = 3
n = 3 3 digits Prime
n = 7 9 digits Prime
n = 31 41 digits Prime
n = 47 63 digits Prime
n = 109 148 digits Prime
n = 151 205 digits Prime
n = 223 303 digits Prime Robert Price
n = 463 630 digits Prime Robert Price
n = 739 1006 digits Prime Robert Price
n = 6427 8751 digits PRP Robert Price
n = 17581 23940 digits PRP Robert Price
n = 30517 41555 digits PRP Robert Price
y = 4
n = 7 9 digits Prime
n = 59 80 digits Prime
n = 167 227 digits Prime
n = 173 235 digits Prime
n = 277 376 digits Prime Robert Price
n = 35339 48121 digits PRP Robert Price
n = 41149 56033 digits PRP Robert Price
n = 46441 63239 digits Nov 2025 PRP Robert Price
y = 5
n = 53 71 digits Prime
n = 137 186 digits Prime
n = 719 978 digits Prime Robert Price
n = 2957 4026 digits PRP Robert Price
n = 5483 7466 digits PRP Robert Price
n = 8147 11093 digits PRP Robert Price
y = 6
n = 2 2 digits Prime
n = 5 6 digits Prime
y = 7
n = 3 3 digits Prime
n = 19 25 digits Prime
y = 8
n = 2 2 digits Prime
n = 7 9 digits Prime
n = 11 14 digits Prime
y = 10
n = 3 3 digits Prime
y = 11
n = 7 9 digits Prime
n = 17 23 digits Prime
y = 12
n = 5 6 digits Prime
y = 13
n = 3 4 digits Prime
n = 7 9 digits Prime
n = 13 17 digits Prime
n = 19 25 digits Prime
y = 14
n = 2 2 digits Prime
y = 15
n = 17 23 digits Prime
y = 16
n = 3 4 digits Prime
n = 17 23 digits Prime
n = 19 26 digits Prime
y = 18
n = 2 3 digits Prime
n = 7 9 digits Prime
n = 17 23 digits Prime
y = 19
n = 3 4 digits Prime
y = 20
n = 2 3 digits Prime
n = 17 23 digits Prime
y = 21
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 8171 11127 digits Dec 2013 PRP Richard Fischer
x = 24
y = 5
n = 2 2 digits Prime
n = 5 6 digits Prime
n = 7 9 digits Prime
n = 17 23 digits Prime
n = 47 64 digits Prime
n = 1549 2137 digits Prime Robert Price
n = 5393 7443 digits PRP Robert Price
n = 5483 7567 digits PRP Robert Price
n = 6397 8828 digits PRP Robert Price
n = 11329 15636 digits PRP Robert Price
n = 46301 63904 digits Jan 2026 PRP Robert Price
y = 7
n = 2 2 digits Prime
y = 11
n = 11 15 digits Prime
n = 23 31 digits Prime
y = 13
n = 2 2 digits Prime
n = 19 26 digits Prime
y = 17
n = 2 2 digits Prime
n = 17 23 digits Prime
y = 19
n = 2 3 digits Prime
n = 7 9 digits Prime
n = 11 15 digits Prime
x = 25
y = 2
n = 11 15 digits Prime
n = 199 277 digits Prime
n = 509 711 digits Prime Robert Price
n = 857 1197 digits Prime Robert Price
n = 42841 59888 digits Nov 2024 PRP Robert Price
y = 3
n = 3 3 digits Prime
n = 5 6 digits Prime
n = 43 59 digits Prime
n = 709 990 digits Prime Robert Price
n = 1151 1608 digits Prime Robert Price
n = 3323 4645 digits PRP Robert Price
n = 3643 5092 digits PRP Robert Price
n = 4637 6481 digits PRP Robert Price
n = 21661 30280 digits PRP Robert Price
y = 4
n = 2 2 digits Prime
y = 6
n = 2 2 digits Prime
n = 3 3 digits Prime
y = 8
n = 5 6 digits Prime
y = 11
n = 3 4 digits Prime
n = 5 6 digits Prime
y = 12
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 13
n = 5 6 digits Prime
y = 14
n = 3 4 digits Prime
n = 13 18 digits Prime
y = 16
n = 2 2 digits Prime
y = 17
n = 5 7 digits Prime
n = 11 15 digits Prime
y = 18
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 19
n = 11 15 digits Prime
y = 22
n = 2 3 digits Prime
n = 13 18 digits Prime
x = 26
y = 3
n = 2 2 digits Prime
n = 31 43 digits Prime
n = 263 371 digits Prime Robert Price
n = 743 1050 digits Prime Robert Price
n = 1439 2035 digits Prime Robert Price
n = 6661 9424 digits PRP Robert Price
n = 78593 111206 digits Feb 2025 PRP Robert Price
y = 5
n = 2 2 digits Prime
n = 79 111 digits Prime
n = 2621 3708 digits PRP Robert Price
n = 21841 30904 digits PRP Robert Price
y = 7
n = 3 3 digits Prime
n = 5 6 digits Prime
y = 9
n = 3 4 digits Prime
n = 19 26 digits Prime
y = 11
n = 2 2 digits Prime
y = 15
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 17 24 digits Prime
y = 17
n = 2 2 digits Prime
n = 7 9 digits Prime
n = 11 15 digits Prime
y = 19
n = 3 4 digits Prime
y = 21
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 23
n = 11 16 digits Prime
x = 27
y = 2
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 269 384 digits Prime Robert Price
n = 401 573 digits Prime Robert Price
n = 631 902 digits Prime Robert Price
n = 701 1002 digits Prime Robert Price
n = 1321 1890 digits Prime Robert Price
n = 2707 3874 digits PRP Robert Price
n = 5471 7830 digits PRP Robert Price
n = 6581 9419 digits PRP Robert Price
y = 4
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 7 9 digits Prime
n = 61 86 digits Prime
n = 617 882 digits Prime Robert Price
n = 10427 14924 digits PRP Robert Price
n = 21529 30815 digits PRP Robert Price
y = 5
n = 5 6 digits Prime
n = 53 75 digits Prime
n = 56597 81010 digits Feb 2026 PRP Robert Price
y = 7
n = 3 3 digits Prime
y = 8
n = 3 4 digits Prime
y = 10
n = 2 2 digits Prime
n = 5 6 digits Prime
y = 11
n = 5 6 digits Prime
n = 17 24 digits Prime
n = 19 26 digits Prime
y = 13
n = 3 4 digits Prime
n = 23 32 digits Prime
y = 14
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 9 digits Prime
n = 19 27 digits Prime
y = 16
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 7 9 digits Prime
n = 13 18 digits Prime
y = 17
n = 11 15 digits Prime
n = 17 24 digits Prime
y = 19
n = 13 18 digits Prime
n = 17 24 digits Prime
y = 20
n = 2 3 digits Prime
n = 3 4 digits Prime
n = 23 33 digits Prime
y = 23
n = 3 4 digits Prime
n = 17 24 digits Prime
y = 25
n = 3 4 digits Prime
n = 17 25 digits Prime
n = 18211 26067 digits Jun 2014 PRP Richard Fischer
n = 20183 28889 digits Nov 2014 PRP Richard Fischer
x = 28
y = 3
n = 2 2 digits Prime
n = 3 3 digits Prime
n = 7 9 digits Prime
n = 43 61 digits Prime
n = 197 284 digits Prime
n = 13397 19387 digits PRP Robert Price
n = 28837 41731 digits PRP Robert Price
n = 29153 42188 digits PRP Robert Price
y = 5
n = 17 24 digits Prime
n = 167 241 digits Prime
n = 317 458 digits Prime Robert Price
n = 2677 3873 digits PRP Robert Price
n = 6689 9679 digits PRP Robert Price
n = 10859 15714 digits PRP Robert Price
n = 28151 40738 digits PRP Robert Price
y = 9
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 11 15 digits Prime
n = 13 18 digits Prime
y = 11
n = 3 4 digits Prime
n = 7 9 digits Prime
y = 13
n = 2 2 digits Prime
y = 15
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 7 10 digits Prime
y = 17
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 7 10 digits Prime
n = 13 18 digits Prime
y = 19
n = 2 2 digits Prime
y = 25
n = 2 3 digits Prime
n = 7 10 digits Prime
x = 29
y = 2
n = 2 2 digits Prime
n = 7 9 digits Prime
n = 139 202 digits Prime
n = 983 1437 digits Prime Robert Price
n = 3257 4762 digits PRP Robert Price
n = 10181 14888 digits PRP Robert Price
n = 26387 38587 digits PRP Robert Price
n = 36187 52919 digits Oct 2024 PRP Robert Price
n = 42557 62234 digits Oct 2024 PRP Robert Price
y = 3
n = 3 3 digits Prime
n = 7 9 digits Prime
n = 17 24 digits Prime
n = 1069 1562 digits Prime Robert Price
n = 28081 41065 digits PRP Robert Price
n = 66509 97262 digits Jun 2025 PRP Robert Price
n = 91493 133798 digits Jun 2025 PRP Robert Price
y = 4
n = 7 9 digits Prime
n = 23 33 digits Prime
n = 31 44 digits Prime
n = 463 676 digits Prime Robert Price
n = 3259 4765 digits PRP Robert Price
y = 5
n = 199 290 digits Prime
n = 643 939 digits Prime Robert Price
n = 16981 24832 digits PRP Robert Price
n = 71761 104942 digits Mar 2026 PRP Robert Price
y = 6
n = 3 4 digits Prime
y = 7
n = 3 4 digits Prime
n = 17 24 digits Prime
y = 8
n = 2 2 digits Prime
n = 13 18 digits Prime
y = 9
n = 7 9 digits Prime
y = 10
n = 3 4 digits Prime
n = 7 9 digits Prime
n = 11 15 digits Prime
n = 17 24 digits Prime
y = 11
n = 5 7 digits Prime
n = 7 9 digits Prime
n = 17 24 digits Prime
y = 12
n = 2 2 digits Prime
n = 13 18 digits Prime
y = 13
n = 7 10 digits Prime
n = 17 24 digits Prime
y = 14
n = 2 2 digits Prime
n = 7 10 digits Prime
n = 11 15 digits Prime
n = 13 18 digits Prime
n = 19 27 digits Prime
y = 16
n = 5 7 digits Prime
y = 17
n = 19 27 digits Prime
y = 18
n = 2 2 digits Prime
n = 5 7 digits Prime
y = 19
n = 3 4 digits Prime
n = 13 19 digits Prime
y = 20
n = 17 24 digits Prime
y = 23
n = 11 16 digits Prime
y = 24
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 25
n = 5 7 digits Prime
y = 26
n = 5 7 digits Prime
y = 27
n = 13 19 digits Prime
x = 30
y = 7
n = 2 2 digits Prime
y = 11
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 13 18 digits Prime
y = 13
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 13 18 digits Prime
y = 17
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 19
n = 3 4 digits Prime
n = 7 10 digits Prime
y = 23
n = 2 3 digits Prime
x = 31
y = 2
n = 5 6 digits Prime
n = 17 24 digits Prime
n = 541 806 digits Nov 2024 Prime Robert Price
n = 701 1044 digits Nov 2024 Prime Robert Price
n = 769 1146 digits Nov 2024 Prime Robert Price
y = 3
n = 3 4 digits Prime
n = 23 33 digits Prime
n = 53 78 digits Prime
n = 661 985 digits Jun 2025 Prime Robert Price
n = 8923 13306 digits Jun 2025 PRP Robert Price
n = 9721 14497 digits Jun 2025 PRP Robert Price
n = 13807 20590 digits Jun 2025 PRP Robert Price
y = 4
n = 7 10 digits Prime
n = 59 87 digits Prime
n = 67 99 digits Prime
n = 101 150 digits Prime
n = 251 373 digits Oct 2025 Prime Robert Price
n = 967 1441 digits Oct 2025 Prime Robert Price
n = 1579 2354 digits Oct 2025 Prime Robert Price
n = 1999 2980 digits Oct 2025 Prime Robert Price
n = 4657 6944 digits Oct 2025 PRP Robert Price
n = 6917 10315 digits Oct 2025 PRP Robert Price
n = 10267 15311 digits Oct 2025 PRP Robert Price
n = 19801 29530 digits Oct 2025 PRP Robert Price
n = 23311 34764 digits Oct 2025 PRP Robert Price
y = 5
n = 7 10 digits Prime
n = 11 15 digits Prime
n = 79 117 digits Prime
n = 431 642 digits Apr 2026 Prime Robert Price
n = 1423 2121 digits Apr 2026 Prime Robert Price
n = 2917 4349 digits Apr 2026 PRP Robert Price
n = 55639 82977 digits Apr 2026 PRP Robert Price
y = 6
n = 2 2 digits Prime
y = 7
n = 5 7 digits Prime
y = 8
n = 7 10 digits Prime
y = 9
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 17 25 digits Prime
y = 10
n = 2 2 digits Prime
y = 11
n = 3 4 digits Prime
y = 12
n = 2 2 digits Prime
n = 7 10 digits Prime
n = 13 19 digits Prime
n = 29 42 digits Prime
y = 14
n = 11 16 digits Prime
n = 13 19 digits Prime
n = 23 34 digits Prime
y = 15
n = 13 19 digits Prime
n = 19 28 digits Prime
y = 16
n = 2 2 digits Prime
n = 7 10 digits Prime
n = 13 19 digits Prime
y = 17
n = 3 4 digits Prime
n = 17 25 digits Prime
n = 29 43 digits Prime
y = 18
n = 5 7 digits Prime
y = 19
n = 11 16 digits Prime
y = 20
n = 5 7 digits Prime
n = 17 25 digits Prime
n = 19 28 digits Prime
y = 21
n = 3 4 digits Prime
n = 19 28 digits Prime
n = 31 46 digits Prime
y = 22
n = 2 3 digits Prime
n = 11 16 digits Prime
y = 23
n = 3 4 digits Prime
n = 11 16 digits Prime
y = 24
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 25
n = 7 10 digits Prime
y = 27
n = 19 28 digits Prime
n = 23 34 digits Prime
n = 29 43 digits Prime
y = 28
n = 2 3 digits Prime
n = 7 10 digits Prime
n = 13 19 digits Prime
y = 29
n = 19 29 digits Prime
x = 32
y = 3
n = 3 4 digits Prime
n = 19 28 digits Prime
n = 37 55 digits Prime
n = 233 350 digits Jun 2025 Prime Robert Price
n = 283 425 digits Jun 2025 Prime Robert Price
n = 311 467 digits Jun 2025 Prime Robert Price
n = 1307 1966 digits Jun 2025 Prime Robert Price
n = 1913 2878 digits Jun 2025 Prime Robert Price
y = 5
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 23 34 digits Prime
n = 79 118 digits Prime
n = 977 1470 digits Apr 2026 Prime Robert Price
n = 1489 2240 digits Apr 2026 Prime Robert Price
n = 1621 2439 digits Apr 2026 Prime Robert Price
n = 10007 15061 digits Apr 2026 PRP Robert Price
n = 11677 17575 digits Apr 2026 PRP Robert Price
n = 32797 49363 digits Apr 2026 PRP Robert Price
n = 39901 60056 digits Apr 2026 PRP Robert Price
n = 43051 64797 digits Apr 2026 PRP Robert Price
n = 60383 90885 digits Apr 2026 PRP Robert Price
n = 86981 130919 digits Apr 2026 PRP Robert Price
y = 7
n = 3 4 digits Prime
y = 9
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 31 46 digits Prime
y = 11
n = 2 2 digits Prime
n = 5 7 digits Prime
y = 13
n = 3 4 digits Prime
y = 15
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 7 10 digits Prime
n = 19 28 digits Prime
n = 29 43 digits Prime
y = 19
n = 3 4 digits Prime
n = 11 16 digits Prime
y = 21
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 13 19 digits Prime
n = 17 25 digits Prime
y = 23
n = 17 25 digits Prime
n = 23 34 digits Prime
y = 25
n = 5 7 digits Prime
y = 27
n = 2 3 digits Prime
n = 3 4 digits Prime
n = 13 19 digits Prime
y = 29
n = 2 3 digits Prime
x = 33
y = 2
n = 71 107 digits Prime
n = 103 155 digits Prime
n = 1213 1841 digits Nov 2024 Prime Robert Price
n = 2441 3706 digits Nov 2024 PRP Robert Price
n = 2789 4234 digits Nov 2024 PRP Robert Price
n = 4159 6315 digits Nov 2024 PRP Robert Price
y = 4
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 13 19 digits Prime
n = 31 46 digits Prime
n = 211 319 digits Oct 2025 Prime Robert Price
y = 5
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 257 389 digits Apr 2026 Prime Robert Price
n = 911 1382 digits Apr 2026 Prime Robert Price
n = 8233 12501 digits Apr 2026 PRP Robert Price
n = 48907 74265 digits Apr 2026 PRP Robert Price
n = 64271 97595 digits Apr 2026 PRP Robert Price
y = 7
n = 7 10 digits Prime
y = 8
n = 2 2 digits Prime
n = 7 10 digits Prime
n = 11 16 digits Prime
y = 10
n = 2 2 digits Prime
n = 5 7 digits Prime
y = 14
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 16
n = 3 4 digits Prime
y = 17
n = 19 28 digits Prime
y = 19
n = 5 7 digits Prime
y = 20
n = 2 2 digits Prime
n = 17 25 digits Prime
y = 23
n = 3 4 digits Prime
y = 25
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 7 10 digits Prime
y = 26
n = 2 3 digits Prime
n = 5 7 digits Prime
n = 13 19 digits Prime
y = 28
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 29
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 31
n = 5 8 digits Prime
x = 34
y = 3
n = 2 2 digits Prime
n = 337 515 digits Jul 2025 Prime Robert Price
n = 421 644 digits Jul 2025 Prime Robert Price
n = 79493 121741 digits Jul 2025 PRP Robert Price
y = 5
n = 19 28 digits Prime
n = 163 249 digits Prime
n = 167 255 digits Prime
n = 1427 2184 digits Apr 2026 Prime Robert Price
n = 2083 3189 digits Apr 2026 Prime Robert Price
y = 7
n = 2 2 digits Prime
n = 13 19 digits Prime
y = 9
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 13
n = 2 2 digits Prime
y = 19
n = 2 2 digits Prime
n = 13 19 digits Prime
n = 17 25 digits Prime
y = 21
n = 3 4 digits Prime
y = 23
n = 3 4 digits Prime
y = 25
n = 2 3 digits Prime
n = 11 16 digits Prime
n = 29 44 digits Prime
y = 27
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 31
n = 19 29 digits Prime
x = 35
y = 2
n = 2 2 digits Prime
n = 17 25 digits Prime
n = 53 81 digits Prime
n = 211 325 digits Nov 2024 Prime Robert Price
n = 4013 6195 digits Nov 2024 PRP Robert Price
n = 55207 85242 digits Nov 2024 PRP Robert Price
y = 3
n = 5 7 digits Prime
n = 31 47 digits Prime
n = 67 102 digits Prime
n = 73 112 digits Prime
n = 991 1529 digits Aug 2025 Prime Robert Price
n = 2053 3169 digits Aug 2025 Prime Robert Price
n = 7507 11590 digits Aug 2025 PRP Robert Price
n = 34603 53428 digits Aug 2025 PRP Robert Price
y = 4
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 47 72 digits Prime
n = 101 155 digits Prime
n = 103 158 digits Prime
n = 107 164 digits Prime
n = 167 257 digits Prime
n = 9743 15043 digits Oct 2025 PRP Robert Price
n = 10627 16408 digits Oct 2025 PRP Robert Price
n = 11423 17637 digits Oct 2025 PRP Robert Price
n = 29027 44819 digits Oct 2025 PRP Robert Price
n = 42461 65562 digits Oct 2025 PRP Robert Price
y = 6
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 10 digits Prime
y = 8
n = 2 2 digits Prime
n = 13 19 digits Prime
n = 29 44 digits Prime
y = 9
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 12
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 13
n = 5 7 digits Prime
n = 17 25 digits Prime
n = 19 28 digits Prime
y = 17
n = 11 16 digits Prime
y = 18
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 13 19 digits Prime
n = 29 44 digits Prime
y = 19
n = 3 4 digits Prime
n = 7 10 digits Prime
y = 23
n = 13 19 digits Prime
y = 24
n = 2 3 digits Prime
n = 7 10 digits Prime
n = 31 47 digits Prime
y = 26
n = 2 3 digits Prime
n = 19 29 digits Prime
y = 27
n = 19 29 digits Prime
y = 29
n = 7 11 digits Prime
n = 31 48 digits Prime
y = 31
n = 3 5 digits Prime
n = 7 11 digits Prime
y = 32
n = 2 3 digits Prime
n = 19 29 digits Prime
n = 23 36 digits Prime
y = 33
n = 3 5 digits Prime
n = 13 20 digits Prime
x = 36
y = 5
n = 2 2 digits Prime
n = 11 16 digits Prime
n = 107 166 digits Prime
n = 113 175 digits Prime
n = 409 636 digits May 2026 Prime Robert Price
n = 5209 8106 digits May 2026 PRP Robert Price
n = 42181 65645 digits May 2026 PRP Robert Price
n = 53693 83562 digits May 2026 PRP Robert Price
y = 7
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 10 digits Prime
y = 11
n = 2 2 digits Prime
n = 11 16 digits Prime
n = 17 26 digits Prime
y = 13
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 17 26 digits Prime
y = 17
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 13 19 digits Prime
y = 19
n = 3 4 digits Prime
n = 7 10 digits Prime
y = 23
n = 2 2 digits Prime
n = 11 17 digits Prime
n = 29 45 digits Prime
y = 25
n = 2 3 digits Prime
y = 29
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 17 26 digits Prime
n = 19 29 digits Prime
y = 31
n = 2 3 digits Prime
n = 3 4 digits Prime
n = 7 11 digits Prime
x = 37
y = 2
n = 3 4 digits Prime
n = 11 16 digits Prime
n = 43 66 digits Prime
n = 19963 31305 digits Nov 2024 PRP Robert Price
y = 3
n = 3 4 digits Prime
n = 137 214 digits Prime
n = 197 308 digits Jul 2025 Prime Robert Price
n = 2113 3313 digits Jul 2025 PRP Robert Price
n = 4729 7415 digits Jul 2025 PRP Robert Price
n = 11497 18029 digits Jul 2025 PRP Robert Price
y = 4
n = 2 2 digits Prime
n = 7 10 digits Prime
n = 5927 9294 digits Jun 2026 PRP Norman Luhn
y = 5
n = 3 4 digits Prime
n = 107 167 digits Prime
n = 1399 2193 digits May 2026 Prime Robert Price
n = 4253 6669 digits May 2026 PRP Robert Price
y = 6
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 7 10 digits Prime
n = 17 26 digits Prime
y = 7
n = 7 10 digits Prime
y = 8
n = 7 10 digits Prime
y = 9
n = 3 4 digits Prime
n = 11 16 digits Prime
y = 10
n = 2 2 digits Prime
y = 11
n = 7 10 digits Prime
y = 12
n = 11 16 digits Prime
n = 13 19 digits Prime
y = 13
n = 37 57 digits Prime
y = 14
n = 3 4 digits Prime
y = 15
n = 5 7 digits Prime
y = 16
n = 2 2 digits Prime
n = 13 20 digits Prime
n = 17 26 digits Prime
n = 19 29 digits Prime
y = 17
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 19 29 digits Prime
n = 31 48 digits Prime
y = 18
n = 17 26 digits Prime
y = 19
n = 13 20 digits Prime
y = 21
n = 5 7 digits Prime
y = 22
n = 2 2 digits Prime
y = 23
n = 3 4 digits Prime
n = 31 48 digits Prime
y = 24
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 26
n = 5 7 digits Prime
y = 29
n = 7 11 digits Prime
n = 17 26 digits Prime
y = 30
n = 2 3 digits Prime
n = 31 48 digits Prime
y = 31
n = 7 11 digits Prime
n = 11 17 digits Prime
y = 32
n = 11 17 digits Prime
y = 33
n = 17 27 digits Prime
n = 19 30 digits Prime
y = 34
n = 2 3 digits Prime
n = 13217 20727 digits Oct 2015 PRP Eric Chen
n = 14563 22838 digits Sep 2016 PRP Eric Chen
y = 35
n = 3 5 digits Prime
x = 38
y = 3
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 19 29 digits Prime
n = 101 159 digits Prime
n = 229 361 digits Jul 2025 Prime Robert Price
n = 1031 1628 digits Jul 2025 Prime Robert Price
n = 2393 3779 digits Jul 2025 Prime Robert Price
n = 3121 4929 digits Jul 2025 Prime Robert Price
n = 4021 6351 digits Jul 2025 PRP Robert Price
y = 5
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 19 29 digits Prime
n = 8831 13950 digits Apr 2026 PRP Robert Price
n = 41647 65792 digits Apr 2026 PRP Robert Price
y = 7
n = 3 4 digits Prime
y = 9
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 13
n = 31 48 digits Prime
y = 15
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 11 17 digits Prime
n = 13 20 digits Prime
y = 17
n = 5 7 digits Prime
y = 21
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 23
n = 2 2 digits Prime
y = 25
n = 3 4 digits Prime
n = 19 29 digits Prime
y = 29
n = 2 3 digits Prime
n = 5 7 digits Prime
n = 7 11 digits Prime
n = 19 30 digits Prime
y = 31
n = 3 4 digits Prime
y = 33
n = 2 3 digits Prime
y = 35
n = 2 3 digits Prime
n = 5 8 digits Prime
x = 39
y = 2
n = 2 2 digits Prime
n = 229 363 digits Prime
n = 631 1003 digits Prime
y = 4
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 29 45 digits Prime
n = 67 106 digits Prime
n = 73 115 digits Prime
n = 7393 11762 digits Jan 2026 PRP Robert Price
n = 14347 22826 digits Jan 2026 PRP Robert Price
n = 14543 23138 digits Jan 2026 PRP Robert Price
n = 23251 36993 digits Jan 2026 PRP Robert Price
y = 5
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 73 115 digits Prime
n = 97 153 digits Prime
n = 419 666 digits May 2026 Prime Robert Price
n = 2857 4545 digits May 2026 PRP Robert Price
n = 25307 40264 digits May 2026 PRP Robert Price
y = 7
n = 7 10 digits Prime
y = 8
n = 2 2 digits Prime
y = 10
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 31 48 digits Prime
y = 14
n = 2 2 digits Prime
y = 17
n = 3 4 digits Prime
y = 19
n = 7 10 digits Prime
y = 20
n = 2 2 digits Prime
n = 11 17 digits Prime
y = 22
n = 2 2 digits Prime
n = 31 49 digits Prime
y = 23
n = 5 7 digits Prime
n = 17 26 digits Prime
y = 25
n = 3 4 digits Prime
y = 28
n = 2 3 digits Prime
n = 5 7 digits Prime
y = 29
n = 17 27 digits Prime
y = 31
n = 3 4 digits Prime
y = 32
n = 2 3 digits Prime
n = 3 4 digits Prime
n = 23 36 digits Prime
y = 34
n = 2 3 digits Prime
n = 3 5 digits Prime
n = 23 36 digits Prime
n = 31 49 digits Prime
y = 35
n = 3 5 digits Prime
n = 17 27 digits Prime
y = 37
n = 9349 14875 digits Dec 2013 PRP Richard Fischer
x = 40
y = 3
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 1549 2481 digits Aug 2025 Prime Robert Price
n = 4391 7034 digits Aug 2025 PRP Robert Price
y = 7
n = 2 2 digits Prime
n = 7 10 digits Prime
n = 29 45 digits Prime
y = 9
n = 5 7 digits Prime
n = 7 10 digits Prime
n = 23 36 digits Prime
y = 11
n = 3 4 digits Prime
y = 13
n = 2 2 digits Prime
y = 19
n = 2 2 digits Prime
y = 21
n = 2 2 digits Prime
n = 13 20 digits Prime
y = 23
n = 3 4 digits Prime
y = 27
n = 2 3 digits Prime
y = 29
n = 5 7 digits Prime
n = 37 59 digits Prime
y = 31
n = 2 3 digits Prime
y = 33
n = 2 3 digits Prime
n = 5 8 digits Prime
n = 13 20 digits Prime
n = 10007 16031 digits Nov 2006 PRP Lelio R Paula
y = 37
n = 31 50 digits Prime
x = 41
y = 2
n = 2 2 digits Prime
n = 41 65 digits Prime
n = 97 155 digits Prime
n = 131 210 digits Prime
n = 2411 3887 digits Nov 2024 PRP Robert Price
n = 7321 11806 digits Nov 2024 PRP Robert Price
y = 3
n = 401 646 digits Sep 2025 Prime Robert Price
n = 443 713 digits Sep 2025 Prime Robert Price
n = 3191 5145 digits Sep 2025 PRP Robert Price
n = 32297 52087 digits Sep 2025 PRP Robert Price
n = 38431 61980 digits Sep 2025 PRP Robert Price
n = 81041 130701 digits Sep 2025 PRP Robert Price
n = 85909 138552 digits Sep 2025 PRP Robert Price
y = 4
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 449 723 digits Prime
y = 5
n = 79 126 digits Prime
n = 353 568 digits May 2026 Prime Robert Price
n = 1213 1955 digits May 2026 Prime Robert Price
n = 1583 2552 digits May 2026 Prime Robert Price
n = 1933 3116 digits May 2026 Prime Robert Price
n = 2221 3581 digits May 2026 PRP Robert Price
y = 6
n = 2 2 digits Prime
n = 19 30 digits Prime
y = 7
n = 3 4 digits Prime
y = 8
n = 5 7 digits Prime
y = 9
n = 3 4 digits Prime
n = 17 26 digits Prime
n = 19 30 digits Prime
n = 23 36 digits Prime
y = 10
n = 13 20 digits Prime
y = 12
n = 2 2 digits Prime
n = 7 10 digits Prime
y = 13
n = 3 4 digits Prime
n = 31 49 digits Prime
y = 14
n = 31 49 digits Prime
y = 15
n = 3 4 digits Prime
n = 11 17 digits Prime
n = 19 30 digits Prime
n = 41 65 digits Prime
y = 16
n = 3 4 digits Prime
n = 13 20 digits Prime
y = 17
n = 7 10 digits Prime
n = 11 17 digits Prime
y = 18
n = 2 2 digits Prime
y = 19
n = 5 7 digits Prime
n = 7 10 digits Prime
y = 20
n = 2 2 digits Prime
n = 19 30 digits Prime
n = 41 65 digits Prime
y = 22
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 7 11 digits Prime
y = 23
n = 5 7 digits Prime
n = 13 20 digits Prime
n = 17 27 digits Prime
y = 24
n = 13 20 digits Prime
n = 19 30 digits Prime
y = 25
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 19 30 digits Prime
y = 26
n = 2 3 digits Prime
n = 19 30 digits Prime
y = 27
n = 3 4 digits Prime
n = 23 36 digits Prime
y = 28
n = 3 4 digits Prime
y = 29
n = 7 11 digits Prime
y = 30
n = 2 3 digits Prime
n = 5 8 digits Prime
n = 7 11 digits Prime
n = 29 46 digits Prime
y = 31
n = 7 11 digits Prime
y = 32
n = 2 3 digits Prime
n = 19 30 digits Prime
y = 33
n = 7 11 digits Prime
y = 34
n = 3 4 digits Prime
n = 23 37 digits Prime
y = 35
n = 17 27 digits Prime
n = 41 66 digits Prime
y = 36
n = 23 37 digits Prime
y = 37
n = 3 5 digits Prime
y = 38
n = 2 3 digits Prime
n = 5 8 digits Prime
n = 7 11 digits Prime
n = 17 27 digits Prime
n = 29 47 digits Prime
y = 39
n = 3 5 digits Prime
n = 17 28 digits Prime
n = 8039 12965 digits Dec 2013 PRP Richard Fischer
x = 42
y = 5
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 3617 5870 digits Jun 2026 PRP Robert Price
n = 75217 122095 digits Jun 2026 PRP Robert Price
y = 11
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 13 20 digits Prime
y = 13
n = 19 30 digits Prime
y = 17
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 19
n = 2 2 digits Prime
y = 23
n = 3 4 digits Prime
n = 23 37 digits Prime
n = 41 66 digits Prime
y = 25
n = 2 3 digits Prime
n = 7 11 digits Prime
y = 29
n = 2 3 digits Prime
n = 3 4 digits Prime
n = 5 8 digits Prime
n = 7 11 digits Prime
n = 11 17 digits Prime
y = 31
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 37
n = 2 3 digits Prime
n = 19 31 digits Prime
x = 43
y = 2
n = 167 272 digits Prime
n = 797 1301 digits Oct 2024 Prime Robert Price
n = 1009 1647 digits Oct 2024 Prime Robert Price
n = 54941 89743 digits Oct 2024 PRP Robert Price
y = 3
n = 3 4 digits Prime
n = 19 30 digits Prime
n = 271 442 digits Sep 2025 Prime Robert Price
n = 12421 20288 digits Sep 2025 PRP Robert Price
y = 4
n = 2 2 digits Prime
n = 17 27 digits Prime
n = 23 36 digits Prime
n = 967 1578 digits Nov 2025 Prime Robert Price
n = 7687 12555 digits Nov 2025 PRP Robert Price
n = 8297 13552 digits Nov 2025 PRP Robert Price
n = 8521 13918 digits Nov 2025 PRP Robert Price
y = 5
n = 3 4 digits Prime
n = 37 59 digits Prime
n = 67 108 digits Prime
y = 6
n = 3 4 digits Prime
n = 19 30 digits Prime
y = 8
n = 17 27 digits Prime
y = 9
n = 37 59 digits Prime
y = 10
n = 2 2 digits Prime
n = 19 30 digits Prime
y = 12
n = 11 17 digits Prime
y = 13
n = 11 17 digits Prime
n = 13 20 digits Prime
n = 31 50 digits Prime
y = 14
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 31 50 digits Prime
y = 15
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 19 30 digits Prime
n = 29 46 digits Prime
y = 16
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 11 17 digits Prime
y = 18
n = 2 2 digits Prime
y = 19
n = 19 30 digits Prime
y = 20
n = 3 4 digits Prime
n = 13 20 digits Prime
y = 22
n = 5 7 digits Prime
n = 29 47 digits Prime
n = 31 50 digits Prime
y = 23
n = 41 66 digits Prime
y = 24
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 43 69 digits Prime
y = 25
n = 5 7 digits Prime
y = 26
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 7 11 digits Prime
n = 11 17 digits Prime
n = 41 66 digits Prime
y = 27
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 28
n = 2 3 digits Prime
n = 7 11 digits Prime
n = 17 27 digits Prime
n = 43 70 digits Prime
y = 30
n = 2 3 digits Prime
y = 31
n = 11 17 digits Prime
n = 43 70 digits Prime
y = 33
n = 3 4 digits Prime
n = 41 66 digits Prime
y = 35
n = 29 47 digits Prime
y = 36
n = 2 3 digits Prime
n = 19 31 digits Prime
y = 37
n = 37 60 digits Prime
n = 43 70 digits Prime
y = 38
n = 17 28 digits Prime
y = 40
n = 2 3 digits Prime
y = 41
n = 13 21 digits Prime
n = 19 31 digits Prime
n = 11587 18927 digits Feb 2012 PRP Lelio R Paula
n = 13037 21296 digits Mar 2014 PRP Richard Fischer
x = 44
y = 3
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 29 47 digits Prime
n = 883 1450 digits Sep 2025 Prime Robert Price
n = 12647 20784 digits Sep 2025 PRP Robert Price
n = 15647 25714 digits Sep 2025 PRP Robert Price
n = 22303 36653 digits Sep 2025 PRP Robert Price
y = 5
n = 547 898 digits Prime
n = 86413 142015 digits Jun 2026 PRP Robert Price
y = 7
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 13 20 digits Prime
n = 23 37 digits Prime
n = 31 50 digits Prime
y = 9
n = 2 2 digits Prime
y = 13
n = 3 4 digits Prime
n = 7 11 digits Prime
n = 17 27 digits Prime
y = 15
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 19 30 digits Prime
y = 17
n = 2 2 digits Prime
n = 7 11 digits Prime
n = 13 20 digits Prime
y = 19
n = 13 20 digits Prime
n = 29 47 digits Prime
y = 21
n = 3 4 digits Prime
n = 29 47 digits Prime
y = 23
n = 2 2 digits Prime
y = 25
n = 7 11 digits Prime
y = 27
n = 2 3 digits Prime
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 29
n = 2 3 digits Prime
n = 13 21 digits Prime
y = 31
n = 3 4 digits Prime
n = 19 31 digits Prime
y = 35
n = 2 3 digits Prime
y = 37
n = 3 5 digits Prime
n = 13 21 digits Prime
n = 43 70 digits Prime
y = 39
n = 2 3 digits Prime
n = 13 21 digits Prime
y = 41
n = 5 8 digits Prime
n = 13 21 digits Prime
x = 45
y = 2
n = 2 2 digits Prime
n = 7 10 digits Prime
n = 89 146 digits Prime
n = 167 275 digits Prime
n = 8101 13392 digits Nov 2024 PRP Robert Price
n = 96517 159562 digits Nov 2024 PRP Robert Price
y = 4
n = 3 4 digits Prime
n = 7 10 digits Prime
n = 47 77 digits Prime
n = 401 662 digits Nov 2025 Prime Robert Price
n = 1237 2044 digits Nov 2025 Prime Robert Price
n = 5659 9354 digits Nov 2025 PRP Robert Price
y = 7
n = 3 4 digits Prime
n = 17 27 digits Prime
n = 23 37 digits Prime
y = 8
n = 2 2 digits Prime
n = 5 7 digits Prime
y = 11
n = 41 67 digits Prime
y = 13
n = 5 7 digits Prime
n = 7 11 digits Prime
y = 14
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 23 37 digits Prime
y = 16
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 11 digits Prime
y = 17
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 13 21 digits Prime
n = 19 30 digits Prime
n = 31 50 digits Prime
y = 22
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 11 17 digits Prime
y = 26
n = 2 3 digits Prime
n = 11 17 digits Prime
n = 17 27 digits Prime
y = 28
n = 2 3 digits Prime
y = 29
n = 5 8 digits Prime
n = 11 17 digits Prime
n = 43 70 digits Prime
y = 32
n = 17 27 digits Prime
n = 37 61 digits Prime
y = 34
n = 2 3 digits Prime
n = 5 8 digits Prime
n = 7 11 digits Prime
n = 37 61 digits Prime
y = 37
n = 3 5 digits Prime
n = 13 21 digits Prime
n = 43 71 digits Prime
y = 38
n = 2 3 digits Prime
n = 3 5 digits Prime
y = 41
n = 5 8 digits Prime
n = 7 11 digits Prime
n = 11 18 digits Prime
n = 19 31 digits Prime
y = 43
n = 6163 10189 digits Dec 2013 PRP Richard Fischer
n = 13829 22862 digits Mar 2014 PRP Richard Fischer
x = 46
y = 3
n = 5 7 digits Prime
n = 17 27 digits Prime
n = 53 87 digits Prime
n = 2113 3512 digits Sep 2025 Prime Robert Price
n = 17981 29897 digits Sep 2025 PRP Robert Price
n = 55997 93108 digits Sep 2025 PRP Robert Price
y = 5
n = 3 4 digits Prime
y = 7
n = 2 2 digits Prime
n = 37 60 digits Prime
n = 41 67 digits Prime
y = 9
n = 7 11 digits Prime
n = 17 27 digits Prime
n = 43 70 digits Prime
y = 11
n = 13 21 digits Prime
y = 13
n = 2 2 digits Prime
n = 7 11 digits Prime
n = 37 61 digits Prime
y = 15
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 17 27 digits Prime
y = 17
n = 3 4 digits Prime
y = 21
n = 2 2 digits Prime
n = 43 71 digits Prime
y = 25
n = 2 3 digits Prime
n = 5 7 digits Prime
y = 27
n = 2 3 digits Prime
n = 7 11 digits Prime
n = 11 18 digits Prime
n = 17 27 digits Prime
y = 31
n = 147197 244752 digits Jun 2024 PRP Aurel Gibier
y = 33
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 35
n = 3 4 digits Prime
n = 5 8 digits Prime
n = 19 31 digits Prime
n = 31 51 digits Prime
y = 37
n = 2 3 digits Prime
n = 5 8 digits Prime
y = 39
n = 3 5 digits Prime
y = 41
n = 3 5 digits Prime
n = 7 11 digits Prime
n = 13 21 digits Prime
y = 43
n = 2 3 digits Prime
x = 47
y = 2
n = 17 27 digits Prime
n = 103 171 digits Prime
n = 773 1291 digits Jan 2025 Prime Robert Price
n = 2467 4124 digits Jan 2025 PRP Robert Price
n = 41969 70175 digits Jan 2025 PRP Robert Price
y = 3
n = 5 7 digits Prime
n = 373 623 digits Prime
n = 3617 6047 digits Jun 2026 PRP Norman Luhn
y = 4
n = 7 11 digits Prime
n = 12703 21240 digits Dec 2025 PRP Robert Price
n = 15679 26216 digits Dec 2025 PRP Robert Price
n = 49711 83121 digits Dec 2025 PRP Robert Price
n = 90749 151740 digits Dec 2025 PRP Robert Price
y = 5
n = 29 47 digits Prime
n = 1019 1703 digits May 2026 Prime Robert Price
n = 83641 139855 digits May 2026 PRP Robert Price
n = 95621 159887 digits May 2026 PRP Robert Price
y = 6
n = 2 2 digits Prime
n = 5 7 digits Prime
y = 7
n = 11 17 digits Prime
n = 29 47 digits Prime
n = 41 67 digits Prime
y = 9
n = 3 4 digits Prime
y = 11
n = 11 17 digits Prime
y = 12
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 47 78 digits Prime
y = 13
n = 5 7 digits Prime
n = 19 31 digits Prime
n = 37 61 digits Prime
y = 14
n = 2 2 digits Prime
n = 7 11 digits Prime
n = 37 61 digits Prime
y = 16
n = 3 4 digits Prime
y = 17
n = 19 31 digits Prime
n = 29 48 digits Prime
y = 18
n = 5 7 digits Prime
n = 7 11 digits Prime
y = 19
n = 3 4 digits Prime
n = 11 17 digits Prime
n = 19 31 digits Prime
y = 20
n = 2 2 digits Prime
n = 7 11 digits Prime
n = 19 31 digits Prime
y = 21
n = 3 4 digits Prime
y = 22
n = 3 4 digits Prime
n = 7 11 digits Prime
n = 13 21 digits Prime
n = 31 51 digits Prime
y = 24
n = 2 2 digits Prime
n = 5 7 digits Prime
n = 17 28 digits Prime
y = 25
n = 19 31 digits Prime
n = 31 51 digits Prime
n = 43 71 digits Prime
y = 26
n = 2 3 digits Prime
y = 27
n = 31 51 digits Prime
y = 28
n = 5 8 digits Prime
n = 7 11 digits Prime
n = 41 68 digits Prime
n = 43 71 digits Prime
y = 29
n = 7 11 digits Prime
n = 31 51 digits Prime
n = 47 78 digits Prime
y = 30
n = 3 4 digits Prime
n = 5 8 digits Prime
n = 7 11 digits Prime
y = 31
n = 7 11 digits Prime
n = 13 21 digits Prime
n = 31 51 digits Prime
y = 32
n = 2 3 digits Prime
n = 7 11 digits Prime
n = 37 61 digits Prime
n = 47 78 digits Prime
y = 33
n = 32833 54899 digits Dec 2016 PRP Serge Batalov
y = 34
n = 19 31 digits Prime
y = 36
n = 2 3 digits Prime
n = 3 4 digits Prime
n = 7 11 digits Prime
n = 47 78 digits Prime
y = 38
n = 13 21 digits Prime
n = 41 68 digits Prime
y = 39
n = 3 5 digits Prime
n = 19 31 digits Prime
y = 40
n = 3 5 digits Prime
n = 41 68 digits Prime
y = 41
n = 5 8 digits Prime
n = 13 21 digits Prime
n = 37 62 digits Prime
y = 42
n = 2 3 digits Prime
n = 7 12 digits Prime
n = 11 18 digits Prime
n = 19 32 digits Prime
y = 43
n = 3 5 digits Prime
n = 5 8 digits Prime
y = 44
n = 5 8 digits Prime
n = 23 38 digits Prime
n = 41 69 digits Prime
y = 45
n = 7 12 digits Prime
n = 13 22 digits Prime
n = 31 52 digits Prime
x = 48
y = 5
n = 2 2 digits Prime
n = 109 182 digits Prime
n = 353 592 digits May 2026 Prime Robert Price
n = 1447 2432 digits May 2026 Prime Robert Price
y = 7
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 11
n = 2 2 digits Prime
n = 3 4 digits Prime
y = 13
n = 2 2 digits Prime
n = 43 71 digits Prime
y = 17
n = 5 7 digits Prime
n = 13 21 digits Prime
y = 19
n = 2 2 digits Prime
n = 19 31 digits Prime
y = 23
n = 2 2 digits Prime
n = 7 11 digits Prime
n = 13 21 digits Prime
y = 25
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 31
n = 2 3 digits Prime
y = 35
n = 2 3 digits Prime
n = 3 4 digits Prime
y = 37
n = 3 5 digits Prime
y = 41
n = 2 3 digits Prime
n = 3 5 digits Prime
y = 43
n = 3 5 digits Prime
n = 11 18 digits Prime
n = 31 52 digits Prime
x = 49
y = 2
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 29 48 digits Prime
n = 89 149 digits Prime
n = 35279 59627 digits Feb 2025 PRP Robert Price
y = 3
n = 3 4 digits Prime
n = 19 31 digits Prime
y = 4
n = 2 2 digits Prime
y = 5
n = 3 4 digits Prime
n = 13 21 digits Prime
n = 61 102 digits Prime
n = 71 119 digits Prime
n = 197 332 digits May 2026 Prime Robert Price
n = 199 335 digits May 2026 Prime Robert Price
n = 233 393 digits May 2026 Prime Robert Price
n = 313 528 digits May 2026 Prime Robert Price
n = 2153 3638 digits May 2026 PRP Robert Price
n = 20731 35038 digits May 2026 PRP Robert Price
y = 6
n = 3 4 digits Prime
n = 5 7 digits Prime
y = 8
n = 3 4 digits Prime
n = 5 7 digits Prime
n = 7 11 digits Prime
y = 10
n = 2 2 digits Prime
n = 17 28 digits Prime
y = 11
n = 3 4 digits Prime
y = 12
n = 2 2 digits Prime
n = 17 28 digits Prime
y = 13
n = 5 7 digits Prime
n = 37 61 digits Prime
y = 15
n = 3 4 digits Prime
n = 7 11 digits Prime
n = 11 18 digits Prime
n = 23 38 digits Prime
y = 17
n = 5 7 digits Prime
n = 7 11 digits Prime
y = 18
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 7 11 digits Prime
y = 19
n = 7 11 digits Prime
y = 20
n = 11 18 digits Prime
n = 37 62 digits Prime
y = 22
n = 2 2 digits Prime
y = 23
n = 3 4 digits Prime
n = 19 31 digits Prime
n = 29 48 digits Prime
y = 24
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 41 68 digits Prime
y = 26
n = 37 62 digits Prime
y = 29
n = 3 4 digits Prime
n = 31 52 digits Prime
y = 30
n = 2 3 digits Prime
n = 5 8 digits Prime
n = 11 18 digits Prime
y = 31
n = 13 21 digits Prime
n = 31 52 digits Prime
y = 32
n = 3 4 digits Prime
n = 7 11 digits Prime
y = 33
n = 3 4 digits Prime
n = 5 8 digits Prime
n = 11 18 digits Prime
n = 17 28 digits Prime
y = 34
n = 2 3 digits Prime
n = 7 11 digits Prime
n = 11 18 digits Prime
y = 37
n = 7 11 digits Prime
n = 13 21 digits Prime
y = 39
n = 19 32 digits Prime
y = 40
n = 2 3 digits Prime
n = 13 22 digits Prime
y = 41
n = 3 5 digits Prime
n = 7 11 digits Prime
n = 19 32 digits Prime
y = 43
n = 5 8 digits Prime
n = 13 22 digits Prime
n = 17 28 digits Prime
y = 44
n = 11 18 digits Prime
y = 45
n = 37 62 digits Prime
y = 46
n = 38069 64344 digits Dec 2016 PRP Serge Batalov
y = 47
n = 8941 15112 digits Dec 2013 PRP Richard Fischer
x = 50
y = 3
n = 2 2 digits Prime
n = 3 4 digits Prime
n = 17 28 digits Prime
y = 9
n = 2 2 digits Prime
n = 17 28 digits Prime
y = 11
n = 2 2 digits Prime
n = 5 7 digits Prime
y = 13
n = 3 4 digits Prime
n = 7 11 digits Prime
n = 17 28 digits Prime
y = 17
n = 2 2 digits Prime
n = 5 7 digits Prime
y = 21
n = 2 2 digits Prime
n = 7 11 digits Prime
n = 41 69 digits Prime
y = 23
n = 2 2 digits Prime
n = 7 11 digits Prime
n = 43 72 digits Prime
y = 27
n = 5 8 digits Prime
n = 11 18 digits Prime
n = 17 28 digits Prime
y = 29
n = 2 3 digits Prime
n = 31 52 digits Prime
n = 47 79 digits Prime
y = 31
n = 3 4 digits Prime
n = 5 8 digits Prime
y = 33
n = 2 3 digits Prime
n = 23 38 digits Prime
n = 47 79 digits Prime
y = 37
n = 31 52 digits Prime
n = 41 69 digits Prime
n = 47 79 digits Prime
y = 39
n = 2 3 digits Prime
n = 13 22 digits Prime
y = 41
n = 7 11 digits Prime
n = 13 22 digits Prime
y = 43
n = 19 32 digits Prime
y = 47
n = 2 3 digits Prime
n = 5 9 digits Prime
n = 13 22 digits Prime
n = 19 32 digits Prime
x = 53
y = 51
n = 8263 14248 digits Dec 2013 PRP Richard Fischer
x = 57
y = 55
n = 11887 20872 digits Feb 2014 PRP Richard Fischer
n = 17011 29869 digits Oct 2014 PRP Richard Fischer
x = 61
y = 59
n = 8807 15724 digits Mar 2008 PRP Lelio R Paula
x = 63
y = 61
n = 7549 13583 digits Dec 2013 PRP Richard Fischer
n = 7919 14249 digits Dec 2013 PRP Richard Fischer
n = 11251 20245 digits Jan 2014 PRP Richard Fischer
x = 69
y = 67
n = 11933 21943 digits Mar 2014 PRP Richard Fischer
x = 71
y = 69
n = 16787 31077 digits Nov 2014 PRP Richard Fischer
x = 73
y = 71
n = 16417 30590 digits Oct 2014 PRP Richard Fischer
x = 85
y = 83
n = 12763 24625 digits Mar 2014 PRP Richard Fischer
n = 17387 33547 digits Dec 2015 PRP Richard Fischer
n = 28751 55473 digits Jun 2021 PRP Richard Fischer
x = 93
y = 22
n = 5227 10288 digits Apr 2006 PRP Lelio R Paula
y = 91
n = 6949 13679 digits Dec 2013 PRP Richard Fischer
x = 99
y = 97
n = 5813 11601 digits Dec 2013 PRP Richard Fischer
x = 103
y = 10
n = 15373 30944 digits Sep 2014 PRP Richard Fischer
n = 18917 38077 digits Apr 2016 PRP Richard Fischer
x = 116
y = 10
n = 5227 10791 digits Nov 2006 PRP Lelio R Paula
x = 155
y = 15
n = 5227 11449 digits Dec 2008 PRP Lelio R Paula
x = 200
y = 12
n = 5227 12026 digits Jan 2009 PRP Lelio R Paula
x = 202
y = 93
n = 30059 69295 digits Feb 2026 PRP Norbert Schneider
x = 205
y = 84
n = 30091 69561 digits Mar 2026 PRP Norbert Schneider
x = 206
y = 11
n = 30089 69620 digits Mar 2026 PRP Norbert Schneider
x = 759
y = 68
n = 5227 15054 digits Jan 2009 PRP Lelio R Paula