| Rank | Term | Digits | When | Who | Comment | Certificate |
|---|---|---|---|---|---|---|
| 1 | R(109297) | 109297 | May 2025 | Andreas Enge; Paul Underwood | Repunit | click |
| 2 | R(86453) | 86453 | May 2023 | Andreas Enge | Repunit | click |
| 3 | 5104824 + 1048245 | 73269 | Feb 2023 | Greg Childers | Leyland plus-form | click |
| 4 | M(221509) / 292391881 | 66673 | Oct 2023 | Andreas Enge; Paul Underwood | Mersenne cofactor | click |
| 5 | 3125330 + 1253303 | 59798 | Dec 2022 | Greg Childers | Leyland plus-form | click |
| 6 | Τ(1994518) | 57125 | Sep 2022 | Andreas Enge | Ramanujan tau function | click |
| 7 | M(174533) / 17794804010102394541862377900092223173807310609 | 52494 | Nov 2022 | Paul Underwood | Mersenne cofactor | click |
| 8 | (94017581 − 1) / 939 | 52268 | Jan 2025 | Ryan S. Propper | Generalized repunit | click |
| 9 | 1050000 + 65859 | 50001 | May 2022 | Andreas Enge | Smallest 50001-digit prime | click |
| 10 | M(151013) / 61157791169561859593299975690769 | 45428 | Sep 2025 | Paul Underwood | Mersenne cofactor | click |
| 11 | 2148227 + 60443 | 44621 | Dec 2024 | Maia Karpovich | Dual Sierpinski Problem | click |
| 12 | Lucas(202667) | 42355 | Nov 2023 | Greg Childers | Lucas number | click |
| 13 | 2139964 + 35461 | 42134 | Oct 2024 | Maia Karpovich | Dual Sierpinski Problem | click |
| 14 | Fib(201107) | 42029 | Sep 2023 | Maia Karpovich | Fibonacci number | click |
| 15 | − E(12146) / 1226039954339 | 41943 | Aug 2025 | Serge Batalov | Euler irregular | click |
| 16 | (2138937 + 1) / 3 | 41824 | Oct 2023 | Andreas Enge; Paul Underwood | Wagstaff | click |
| 17 | M(136883) / 536581361 | 41198 | Aug 2025 | Paul Underwood | Mersenne cofactor | click |
| 18 | E(11848) / 7910215 | 40792 | Aug 2022 | David Broadhurst; Paul Underwood | Euler irregular | click |
| 19 | Lucas(193201) | 40377 | Dec 2023 | Greg Childers | Lucas number | click |
| 20 | 1040000 + 14253 | 40001 | Jun 2022 | Andreas Enge | Smallest 40001-digit prime | click |
| 21 | M(130439) / 260879 | 39261 | Feb 2023 | Alan Mock | Mersenne cofactor | click |
| 22 | Τ(474176) | 38404 | Jun 2022 | Andreas Enge | Ramanujan tau function | click |
| 23 | Lucas(183089) | 38264 | Dec 2023 | Greg Childers | Lucas number | click |
| 24 | (2127031 + 1) / 3 | 38240 | Jan 2023 | Paul Underwood | Wagstaff | click |
| 25 | 378296 + 782963 | 37357 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 26 | Φ(13875,124750) / 14963669110546259757220673451001 | 36661 | Sep 2024 | Tom Wu | Part of BLS primality Proof of (12475027751 − 1) / 124749 |
click |
| 27 | 6320018 + 2001863 | 36020 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 28 | 2119087 − 1190872 | 35849 | Mar 2024 | Tengfei Wang | Leyland minus-form | click |
| 29 | (2117239 + 1) / 3 | 35292 | Jul 2022 | Ryan S. Propper | Wagstaff | click |
| 30 | p(1000007396) | 35219 | Aug 2022 | Greg Childers | Partitions | click |
| 31 | 1864754598 • Bern(12306) / 7988337402668760859 | 35160 | Jul 2025 | Serge Batalov | Irregular | click |
| 32 | 9 • 1034838 + 7 | 34839 | Aug 2023 | Markus Tervooren | - | click |
| 33 | E(10168) / 1097239206089665 | 34323 | Oct 2023 | Frank Doornink | Euler irregular | click |
| 34 | Φ(717, − 1072) | 34273 | Aug 2025 | Serge Batalov | Unique | click |
| 35 | Lucas(159521) | 33338 | Nov 2023 | Greg Childers | Lucas number | click |
| 36 | Φ(12345,92365) / 382141463174433542855941 | 32630 | Jun 2024 | Tom Wu | Part of BLS primality Proof of (9236524691 − 1) / 92364 |
click |
| 37 | (1825667 − 1) / 17 | 32218 | Jun 2022 | Paul Underwood | Generalized repunit | click |
| 38 | Φ(34051, − 10) | 32033 | Aug 2025 | Serge Batalov | Unique | click |
| 39 | 2105789 + 48527 | 31846 | Oct 2023 | Maia Karpovich | Dual Sierpinski Problem | click |
| 40 | Φ(23023, − 100) | 31681 | Aug 2025 | Serge Batalov | Unique | click |
| 41 | M(105269) / 151888973648615898448098254186003467843831193426357780775029327271885867309638591059561 |
31603 | Sep 2024 | Serge Batalov | Mersenne cofactor | click |
| 42 | Φ(4613, − 108) | 31585 | Aug 2025 | Serge Batalov | Unique | click |
| 43 | Φ(10295, − 104) | 31360 | Aug 2025 | Serge Batalov | Unique | click |
| 44 | 2104095 + 7013 | 31336 | Oct 2023 | Maia Karpovich | Dual Sierpinski Problem | click |
| 45 | 2103766 + 17659 | 31237 | Apr 2023 | Maia Karpovich | Dual Sierpinski Problem | click |
| 46 | − E(9266) / 2129452307358569777 | 30900 | May 2023 | Frank Doornink | Euler irregular | click |
| 47 | Φ(11589, − 104) | 30897 | Oct 2022 | Serge Batalov | Unique | click |
| 48 | Lucas(145703) / 179214691 | 30442 | Nov 2023 | Greg Childers | Lucas cofactor | click |
| 49 | Lucas(145193) / 38621339 | 30336 | Nov 2023 | Greg Childers | Lucas cofactor | click |
| 50 | (7116384 + 1) / 2 | 30331 | Apr 2023 | Alan Mock | Generalized Fermat cofactor | click |
| 51 | 17013451 − 13451170 | 30002 | Mar 2024 | Tengfei Wang | Leyland minus-form | click |
| 52 | Φ(36547, − 10) | 29832 | Jun 2022 | Serge Batalov | Unique | click |
| 53 | 299069 + 990692 | 29823 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 54 | Φ(18756,58425) | 29744 | Sep 2025 | Tom Wu | Part of BLS primality Proof of (5842518757 − 1) / 58424 |
click |
| 55 | See PrimePages for expression | 29210 | Oct 2025 | Serge Batalov; Ryan S. Propper | Lehmer primitive part prime (new) | click |
| 56 | 1029028 − 2 • 108312 − 1 | 29028 | Jul 2025 | Tengfei Wang | Near repdigit | click |
| 57 | Φ(21960,102936) / 5017642938047862206894175676419044635657201 | 28830 | Jul 2024 | Tom Wu | Part of BLS primality Proof of (10293621961 − 1) / 102935 |
click |
| 58 | 1922182 − 2218219 | 28366 | May 2025 | Tengfei Wang | Leyland minus-form | click |
| 59 | (1111111102 • 1028243 − 1) / 9 | 28252 | Apr 2024 | Tengfei Wang | - | click |
| 60 | Φ(8553,74968) / 12199774257779118942571063 | 27762 | Sep 2025 | Tom Wu | Part of BLS primality Proof of (7496817107 − 1) / 74967 |
click |
| 61 | Fib(132409) / 2882138154561602271737 | 27651 | Aug 2024 | Serge Batalov | Fibonacci cofactor | click |
| 62 | 70877087 + 1616 | 27289 | Jun 2025 | Tengfei Wang | Lifchitz plus-form | click |
| 63 | 9 • 1026725 + 7 | 26726 | Aug 2023 | Markus Tervooren | - | click |
| 64 | See PrimePages for expression | 26668 | Sep 2025 | Serge Batalov; Ryan Propper | Part of CHG-proof of Lehmer number (new) |
click |
| 65 | Τ(1572206) | 26643 | Jul 2022 | Greg Childers | Ramanujan tau function | click |
| 66 | 288071 + 88071 | 26513 | Jun 2025 | Tengfei Wang | Prime of form 2x + x | click |
| 67 | M(87691) / 806957040167570408395443233 | 26371 | Nov 2022 | Serge Batalov | Mersenne cofactor | click |
| 68 | 1026045 − 3 | 26045 | Jan 2024 | U.N.Owen | Near repdigit | click |
| 69 | (11 • 1026000 − 17) / 3 | 26001 | Aug 2022 | Florian Piesker | - | click |
| 70 | M(86371) / 41681512921035887 | 25984 | Jun 2022 | Ryan S. Propper | Mersenne cofactor | click |
| 71 | − E(7894) / 19 | 25790 | May 2023 | Frank Doornink | Euler irregular | click |
| 72 | Lucas(122869) / 50429766416459430193411 | 25656 | Apr 2024 | Serge Batalov | Lucas cofactor | click |
| 73 | primU(183537) | 25571 | Oct 2024 | Serge Batalov | Fibonacci primitive part | click |
| 74 | 2119304 − 1930421 | 25525 | Feb 2024 | Tengfei Wang | Leyland minus-form | click |
| 75 | Fib(120937) / 3311205867595743073258613 | 25250 | Apr 2024 | Serge Batalov | Fibonacci cofactor | click |
| 76 | 20927579 + 75792092 | 25167 | Oct 2023 | Anonymous | Leyland plus-form | click |
| 77 | 51226753 + 67535122 | 25050 | May 2022 | Greg Childers | Leyland plus-form | click |
| 78 | primV(194181) | 24908 | Oct 2024 | Serge Batalov | Lucas primitive part | click |
| 79 | Lucas(119162) / 3 | 24903 | Oct 2024 | Serge Batalov | Lucas cofactor | click |
| 80 | − E(7634) / 1559 | 24828 | May 2023 | Frank Doornink | Euler irregular | click |
| 81 | primU(118319) | 24553 | Oct 2024 | Serge Batalov | Fibonacci primitive part | click |
| 82 | Fib(117167) / 17658707237 | 24476 | Apr 2024 | Serge Batalov | Fibonacci cofactor | click |
| 83 | Lucas(116593) / 120790349 | 24359 | Nov 2023 | Greg Childers | Lucas cofactor | click |
| 84 | 280307 − 803072 | 24175 | Jan 2024 | Tengfei Wang | Leyland minus-form | click |
| 85 | primV(214470) | 23895 | Oct 2024 | Serge Batalov | Lucas primitive part | click |
| 86 | primU(115373) | 23875 | Oct 2024 | Serge Batalov | Fibonacci primitive part | click |
| 87 | primU(135421) | 23725 | Oct 2024 | Serge Batalov | Fibonacci primitive part | click |
| 88 | M(78737) / 1590296767505866614563328548192658003295567890593 | 23654 | May 2022 | Ryan S. Propper | Mersenne cofactor | click |
| 89 | primV(143234) | 23654 | Oct 2024 | Serge Batalov | Lucas primitive part | click |
| 90 | primU(164185) | 23524 | Oct 2024 | Serge Batalov | Fibonacci primitive part | click |
| 91 | 20097104 − 71042009 | 23465 | Jun 2025 | Tengfei Wang | Leyland minus-form | click |
| 92 | See FactorDB for expression | 23429 | Jun 2022 | Andreas Enge | - | click |
| 93 | 20127043 − 70432012 | 23268 | May 2025 | Tengfei Wang | Leyland minus-form | click |
| 94 | primU(166737) | 23231 | Oct 2024 | Serge Batalov | Fibonacci primitive part | click |
| 95 | See PrimePages for expression | 23130 | Sep 2025 | Serge Batalov; Ryan Propper | Part of BLS-proof of Lehmer number (new) |
click |
| 96 | primA(275285) | 23012 | Mar 2024 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 97 | primV(110723) | 22997 | Oct 2024 | Serge Batalov | Lucas primitive part | click |
| 98 | (1022973 + 53) / 9 | 22973 | Mar 2024 | U.N.Owen | Near repdigit | click |
| 99 | (34 • 1022925 − 61) / 9 | 22926 | Jul 2025 | Anonymous | - | click |
| 100 | primV(180906) | 22905 | Sep 2024 | Serge Batalov | Lucas primitive part | click |
| 101 | 923840 − 238409 | 22750 | Jan 2024 | Tengfei Wang | Leyland minus-form | click |
| 102 | (32569 • 2615921 + 21) / 5 | 22532 | Mar 2023 | Florian Piesker | - | click |
| 103 | Fib(106663) / 35892566541651557 | 22275 | Apr 2024 | Serge Batalov | Fibonacci cofactor | click |
| 104 | 348054 • Bern(8286)/1570865077944473903275073668721 | 22234 | Dec 2022 | Serge Batalov | Irregular | click |
| 105 | p(398256632) | 22223 | Apr 2022 | Serge Batalov | Partitions | click |
| 106 | Fib(105509) / 144118801533126010445795676378394340544227572822879081 | 21997 | Jul 2022 | Serge Batalov | Fibonacci cofactor | click |
| 107 | 9911006 + 1100699 | 21964 | Sep 2024 | Oliver Kruse | Leyland plus-form | click |
| 108 | 1021873 − 3 | 21873 | Aug 2022 | Markus Tervooren | Near repdigit | click |
| 109 | 3314398 − 1439833 | 21864 | May 2025 | Tengfei Wang | Leyland minus-form | click |
| 110 | primB(282035) | 21758 | Oct 2023 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 111 | primA(276335) | 21736 | Mar 2024 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 112 | 1021717 + 7 | 21718 | Apr 2024 | U.N.Owen | - | click |
| 113 | primV(154281) | 21495 | Nov 2023 | Greg Childers | Lucas primitive part | click |
| 114 | (3131 • 271216 − 11) / 15 | 21441 | Jul 2022 | Florian Piesker | - | click |
| 115 | primA(296695) | 21137 | Oct 2023 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 116 | primA(413205) | 21127 | Sep 2023 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 117 | 269999 + 35583 | 21072 | Aug 2023 | Frank Doornink | Smallest 70000-bit prime | click |
| 118 | p(355646102) | 21000 | Jul 2022 | Serge Batalov | Partitions | click |
| 119 | (1120161 − 1) / 10 | 20995 | Jun 2022 | Florian Piesker | Generalized repunit | click |
| 120 | 14 • 1916415 + 381 | 20992 | Jun 2022 | Florian Piesker | - | click |
| 121 | Lucas(100417) / 7130429037791016075118087990532064354948544338847967474370719436805470448849 |
20911 | Apr 2024 | Serge Batalov | Lucas cofactor | click |
| 122 | p(350199893) | 20838 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 123 | 1299820 + 9820129 | 20726 | Sep 2024 | Oliver Kruse | Leyland plus-form | click |
| 124 | primU(102689) | 20715 | Sep 2024 | Serge Batalov | Fibonacci primitive part | click |
| 125 | primU(105821) | 20598 | Sep 2022 | Serge Batalov | Fibonacci primitive part | click |
| 126 | ((((((25210088873 + 80)3 + 12)3 + 450)3 + 894)3 + 3636)3 + 70756)3 + 97220 | 20562 | Jun 2022 | Greg Childers | Mills' prime re-certified via CM |
click |
| 127 | (343063 − 1) / 2 | 20546 | Nov 2023 | Anonymous | Generalized repunit | click |
| 128 | primU(172179) | 20540 | Sep 2022 | Serge Batalov | Fibonacci primitive part | click |
| 129 | Lucas(98081) / 84490439013599359615894385176643888515853963025217237339 | 20442 | Apr 2024 | Serge Batalov | Lucas cofactor | click |
| 130 | See FactorDB for expression | 20401 | Oct 2025 | Serge Batalov | - (new) | click |
| 131 | Τ(412296) | 20367 | Jun 2022 | Greg Childers | Ramanujan tau function | click |
| 132 | 19986137 − 61371998 | 20256 | Feb 2024 | Tengfei Wang | Leyland minus-form | click |
| 133 | (3567937 + 1) / 357 | 20249 | Jul 2022 | Florian Piesker | Generalized Wagstaff | click |
| 134 | 4404139952163 • 267002 − 5 | 20183 | Jul 2024 | Serge Batalov | Part of a prime triplet | click |
| 135 | primV(112028) | 20063 | May 2022 | Serge Batalov | Lucas primitive part | click |
| 136 | 53705370 + 44114411 | 20030 | May 2024 | Oliver Kruse | Lifchitz plus-form | click |
| 137 | 26685841 + 58412668 | 20013 | Dec 2022 | Greg Childers | Leyland plus-form | click |
| 138 | (1020004 − 1) / 9 − 10228 | 20004 | May 2025 | Tengfei Wang | Near repdigit | click |
| 139 | 1020000 + 56149 | 20001 | Nov 2024 | U.N.Owen | Smallest 20001-digit prime | click |
| 140 | p(322610098) | 20000 | Jun 2022 | Serge Batalov | Partitions | click |
| 141 | 266436 + 18181 | 20000 | Jul 2022 | Florian Piesker | - | click |
| 142 | 1019999 + 1514722611 | 20000 | Jun 2022 | Paul Underwood | Part of the smallest 20000-digit twin prime | click |
| 143 | 1019999 + 1514722609 | 20000 | Jun 2022 | Paul Underwood | Part of the smallest 20000-digit twin prime | click |
| 144 | 1019999 + 110949 | 20000 | Jun 2022 | Paul Underwood | Smallest 20000-digit prime | click |
| 145 | primV(151521) | 19863 | Jun 2022 | Serge Batalov | Lucas primitive part | click |
| 146 | 264773 − 647732 | 19499 | Jan 2024 | Tengfei Wang | Leyland minus-form | click |
| 147 | 39585411 + 54113958 | 19466 | May 2022 | Greg Childers | Leyland plus-form | click |
| 148 | M(66497) / M (2293) / 7140061530624311 | 19312 | Sep 2025 | Alex Kruppa | Mersenne cofactor (new) | click |
| 149 | M(64381) / 18252318785612645711774019109285438988204922542528174996118699181907547497 | 19308 | Apr 2024 | Serge Batalov | Mersenne cofactor | click |
| 150 | Lucas(91943) / 12774901180031755171852992299 | 19187 | Jul 2022 | Serge Batalov | Lucas cofactor | click |
| 151 | (V(428,1,8019) − 1) / (V(428,1,729) − 1) | 19184 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 152 | Lucas(91873) / 119273493071598409455551351 | 19175 | Jul 2022 | Serge Batalov | Lucas cofactor | click |
| 153 | (2 • 1019153 + 691) / 9 | 19153 | Jun 2022 | Greg Childers | - | click |
| 154 | primU(137439) | 19148 | Jun 2022 | Serge Batalov | Fibonacci primitive part | click |
| 155 | floor(π • 1019176) % (1019128) | 19128 | Feb 2023 | Oliver Kruse | String in Pi | click |
| 156 | primU(107779) | 18980 | May 2022 | Serge Batalov | Fibonacci primitive part | click |
| 157 | ( U(162,1,8581) + U(162,1,8580) ) / ( U(162,1,66) + U(162,1,65) ) | 18814 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 158 | See FactorDB for expression | 18718 | Jun 2022 | Andreas Enge | - | click |
| 159 | (82 • 1018592 − 1) / 9 | 18593 | Aug 2023 | Markus Tervooren | Near repdigit | click |
| 160 | ( U(859,1,6385) − U(859,1,6384) ) / ( U(859,1,57) − U(859,1,56) ) | 18567 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 161 | (505 • 1018470 − 1) / 9 | 18472 | Jun 2022 | Florian Piesker | - | click |
| 162 | primB(220895) | 18465 | Jun 2022 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 163 | 1748192 + 1218192 | 18355 | Jan 2023 | Youcef Lemsafer | - | click |
| 164 | primV(153279) | 18283 | May 2022 | Serge Batalov | Lucas primitive part | click |
| 165 | See FactorDB for expression | 18192 | Aug 2025 | Alex Kruppa | Mersenne cofactor of M(123435) | click |
| 166 | See FactorDB for expression | 18190 | Jul 2025 | Alex Kruppa | Cyclotomic polynomial cofactor of M(242730) |
click |
| 167 | (721520 + 41) / 6 | 18186 | Dec 2022 | Florian Piesker | Near repdigit in base 7 | click |
| 168 | (10504 • 1018178 − 1) / 9 | 18182 | Apr 2023 | Florian Piesker | - | click |
| 169 | 259999 + 26453 | 18062 | Oct 2023 | Frank Doornink | Smallest 60000-bit prime | click |
| 170 | 259395 − 593952 | 17880 | May 2025 | Tengfei Wang | Leyland minus-form | click |
| 171 | primB(235015) | 17856 | May 2022 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 172 | (1737 • 525415 − 1) / 4 | 17767 | Oct 2022 | Anonymous | - | click |
| 173 | 1017753 + 3 | 17754 | Mar 2024 | U.N.Owen | - | click |
| 174 | (3407001 + 1) / 341 | 17721 | Jul 2022 | Florian Piesker | Generalized Wagstaff | click |
| 175 | primV(148197) | 17696 | May 2022 | Serge Batalov | Lucas primitive part | click |
| 176 | ((236656 + 1)2 + 3) / ((27332 + 1)2 + 3) / 151 | 17653 | Mar 2025 | Alex Kruppa | - | click |
| 177 | 918494 − 184949 | 17648 | Jan 2024 | Tengfei Wang | Leyland minus-form | click |
| 178 | (336913 − 1) / 2 | 17612 | Dec 2022 | Florian Piesker | Generalized repunit | click |
| 179 | ( V(447,1,6723) + 1 ) / ( V(447,1,81) + 1 ) | 17604 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 180 | (79 • 739339 − 1) / 6 | 17403 | Jul 2022 | Florian Piesker | - | click |
| 181 | 1017343 + 777 | 17344 | Dec 2023 | U.N.Owen | - | click |
| 182 | primV(169830) | 17335 | May 2022 | Serge Batalov | Lucas primitive part | click |
| 183 | 257285 + 572852 | 17245 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 184 | 720366 − 203667 | 17212 | Jan 2024 | Tengfei Wang | Leyland minus-form | click |
| 185 | (257146 + 228573 + 1) / 1057378152607 | 17191 | Oct 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(171438) |
click |
| 186 | (3816659 + 1) / 382 | 17184 | Jul 2022 | Florian Piesker | Generalized Wagstaff | click |
| 187 | ( V(1578,1,5589) + 1 ) / ( V(1578,1,243) + 1 ) | 17098 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 188 | M(19) • M(60287) / M(3173) / M(361) | 17091 | Sep 2024 | Alex Kruppa | Mersenne cofactor of M(60287) | click |
| 189 | (176874003 − 1) / 17686 | 17000 | Mar 2024 | Edwin Hall | Generalized repunit | click |
| 190 | primV(101510) | 16970 | May 2022 | Serge Batalov | Lucas primitive part | click |
| 191 | (1016922 − 91) / 9 | 16922 | May 2025 | Tengfei Wang | Near repdigit | click |
| 192 | (17 • 1016918 + 7) / 3 | 16919 | Aug 2023 | Markus Tervooren | - | click |
| 193 | (3186733 + 1) / 319 | 16847 | Jul 2022 | Florian Piesker | Generalized Wagstaff | click |
| 194 | See FactorDB for expression | 16734 | Jun 2022 | Andreas Enge | - | click |
| 195 | See FactorDB for expression | 16716 | Sep 2024 | Alex Kruppa | Mersenne cofactor of M(69625) | click |
| 196 | (17 • 1016628 + 7) / 3 | 16629 | Aug 2023 | Markus Tervooren | - | click |
| 197 | (V(1240,1,5589) − 1) / (V(1240,1,243) − 1) | 16538 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 198 | primA(201485) | 16535 | May 2022 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 199 | ( U(800,1,5725) − U(800,1,5724) ) / ( U(800,1,54) − U(800,1,53) ) | 16464 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 200 | 708853 − 885370 | 16335 | Jun 2025 | Tengfei Wang | Leyland minus-form | click |
| 201 | 17484430616589 • 254201 + 5 | 16330 | Jun 2024 | Serge Batalov | Part of a CPAP-3; d = 6 | click |
| 202 | 17484430616589 • 254201 − 7 | 16330 | Jun 2024 | Serge Batalov | Part of a CPAP-3; d = 6 | click |
| 203 | (1427537 + 1) / 143 | 16220 | Jul 2022 | Florian Piesker | Generalized Wagstaff | click |
| 204 | primB(225785) | 16176 | May 2022 | Serge Batalov | Lucas Aurifeuillian primitive part | click |
| 205 | (1214951 − 1) / 11 | 16134 | Aug 2022 | Florian Piesker | Generalized repunit | click |
| 206 | (11023 • 1016097 − 1) / 3 | 16101 | May 2023 | Florian Piesker | - | click |
| 207 | 1016076 + 67 | 16077 | Nov 2023 | U.N.Owen | - | click |
| 208 | (25453 • 1015998 − 1) / 9 | 16002 | Apr 2023 | Florian Piesker | - | click |
| 209 | (4695987 − 1) / 468 | 15990 | Jul 2022 | Florian Piesker | Generalized repunit | click |
| 210 | 19194818 − 48181919 | 15818 | May 2025 | Tengfei Wang | Leyland minus-form | click |
| 211 | (19 • 620238 + 2501) / 35 | 15748 | Apr 2023 | Florian Piesker | - | click |
| 212 | 36574400 + 44003657 | 15678 | Oct 2023 | Anonymous | Leyland plus-form | click |
| 213 | See FactorDB for expression | 15587 | Aug 2025 | Alex Kruppa | - | click |
| 214 | See FactorDB for expression | 15587 | Aug 2024 | Alex Kruppa | Mersenne cofactor of M(64165) | click |
| 215 | (619889 − 1) / 5 | 15476 | Aug 2022 | Florian Piesker | Generalized repunit | click |
| 216 | See FactorDB for expression | 15450 | Apr 2023 | Youcef Lemsafer | - | click |
| 217 | (17 • 1015448 + 7) / 3 | 15449 | Aug 2023 | Markus Tervooren | - | click |
| 218 | (718251 + 1) / 8 | 15423 | Aug 2022 | Anonymous | Generalized Wagstaff | click |
| 219 | 22484537 + 45372248 | 15208 | Aug 2022 | Greg Childers | Leyland plus-form | click |
| 220 | 1015103 − 63987 | 15103 | Nov 2023 | U.N.Owen | - | click |
| 221 | 26384405 + 44052638 | 15071 | May 2022 | Greg Childers | Leyland plus-form | click |
| 222 | 249999 + 24783 | 15052 | Jul 2023 | Maia Karpovich | Smallest 50000-bit prime | click |
| 223 | 14534752 − 47521453 | 15028 | Feb 2024 | Florian Piesker | Leyland minus-form | click |
| 224 | 39114180 + 41803911 | 15016 | Dec 2022 | Greg Childers | Leyland plus-form | click |
| 225 | (31794291 − 42913179) / 8886701589272771624 | 15010 | Apr 2024 | Markus Tervooren | Leyland minus-form cofactor | click |
| 226 | (14774734 + 47341477) / 53 | 15003 | Apr 2023 | Youcef Lemsafer | Leyland plus-form cofactor | click |
| 227 | (41474147 + 2022) / 5435 | 15000 | Mar 2024 | Edwin Hall | - | click |
| 228 | (210983952048 + 1) / 2 | 15000 | Mar 2024 | Edwin Hall | GFN-11 cofactor | click |
| 229 | ( V(1212,1,4887) + 1) / ( V(1212,1,27) + 1 ) | 14986 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 230 | (1506883 + 1) / 151 | 14976 | Jun 2022 | Florian Piesker | Generalized Wagstaff | click |
| 231 | 1077372 + 7372107 | 14961 | Oct 2023 | Ryan S. Propper | Leyland plus-form | click |
| 232 | 17164613 + 46131716 | 14921 | Nov 2023 | Ryan S. Propper | Leyland plus-form | click |
| 233 | 3455876 + 5876345 | 14913 | Nov 2023 | Ryan S. Propper | Leyland plus-form | click |
| 234 | 11594866 + 48661159 | 14910 | Nov 2023 | Anonymous | Leyland plus-form | click |
| 235 | 5128801 + 8015128 | 14890 | Oct 2025 | Ryan S. Propper | Leyland plus-form (new) | click |
| 236 | ((231 − 1)1597 − 1) / (231 − 2) / 634021777 | 14885 | Jun 2022 | Greg Childers | - | click |
| 237 | 3765755 + 5755376 | 14821 | Nov 2023 | Anonymous | Leyland plus-form | click |
| 238 | 17154558 + 45581715 | 14742 | Nov 2023 | Anonymous | Leyland plus-form | click |
| 239 | ( V(696,1,5211) + 1 ) / ( V(696,1,27) + 1 ) | 14737 | Jun 2022 | Serge Batalov | Lehmer primitive part | click |
| 240 | 19454476 + 44761945 | 14722 | Nov 2023 | Anonymous | Leyland plus-form | click |
| 241 | 3815698 + 5698381 | 14707 | Nov 2023 | Anonymous | Leyland plus-form | click |
| 242 | See FactorDB for expression | 14703 | Jun 2022 | Greg Childers | - | click |
| 243 | 10874840 + 48401087 | 14696 | Nov 2023 | Anonymous | Leyland plus-form | click |
| 244 | 33484163 + 41633348 | 14674 | Jan 2024 | Ryan S. Propper | Leyland plus-form | click |
| 245 | 16374554 + 45541637 | 14637 | Jan 2024 | Ryan S. Propper | Leyland plus-form | click |
| 246 | See FactorDB for expression | 14500 | Sep 2024 | Alfred Reich | Generalized repunit cofactor of R(17003) |
click |
| 247 | 40224022 + 20252025 | 14498 | Jun 2025 | Tengfei Wang | Lifchitz plus-form | click |
| 248 | 27724211 + 42112772 | 14498 | Jan 2024 | Ryan S. Propper | Leyland plus-form | click |
| 249 | (117514072048 + 1) / 2 | 14480 | Nov 2024 | Alfred Reich | GFN-11 cofactor | click |
| 250 | 25804241 + 42412580 | 14469 | Jan 2024 | Ryan S. Propper | Leyland plus-form | click |
| 251 | 8164949 + 4949816 | 14410 | Jan 2024 | Ryan S. Propper | Leyland plus-form | click |
| 252 | p(158221457) | 14404 | Jul 2022 | Serge Batalov | Partitions | click |
| 253 | 19914342 + 43421991 | 14325 | Oct 2023 | Ryan S. Propper | Leyland plus-form | click |
| 254 | 19164359 + 43591916 | 14308 | Oct 2023 | Ryan S. Propper | Leyland plus-form | click |
| 255 | 917300 + 730091 | 14302 | Oct 2023 | Anonymous | Leyland plus-form | click |
| 256 | See FactorDB for expression | 14297 | Aug 2024 | Alex Kruppa | Mersenne cofactor of M(52193) | click |
| 257 | 1113674 − 1367411 | 14241 | Jan 2024 | Tengfei Wang | Leyland plus-form | click |
| 258 | See FactorDB for expression | 14035 | Aug 2024 | Alex Kruppa | Mersenne cofactor of M(93195) | click |
| 259 | 38 • (1014032 + 61) / 210606316076673 | 14020 | Apr 2023 | Youcef Lemsafer | - | click |
| 260 | p(158375386) | 14011 | Jul 2022 | Serge Batalov | Partitions | click |
| 261 | p(158295265) | 14007 | Jul 2022 | Serge Batalov | Partitions | click |
| 262 | 21544153 + 41532154 | 13843 | May 2022 | Paul Leyland | Leyland plus-form | click |
| 263 | 1013808 + 32791 | 13809 | Aug 2024 | Alfred Reich | - | click |
| 264 | See FactorDB for expression | 13786 | Aug 2024 | Alex Kruppa | Mersenne cofactor of M(58315) | click |
| 265 | 11 • (245616 + 1) / 3 | 13733 | Jun 2022 | Florian Piesker | - | click |
| 266 | (5045059 + 1) / 505 | 13669 | Jun 2022 | Florian Piesker | Generalized Wagstaff | click |
| 267 | 13354364 + 43641335 | 13640 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 268 | 26073976 + 39762607 | 13583 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 269 | 4995026 + 5026499 | 13561 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 270 | 916918 + 691891 | 13553 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 271 | 17274162 + 41621727 | 13474 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 272 | 23613992 + 39922361 | 13466 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 273 | 29853874 + 38742985 | 13462 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 274 | 1036682 + 6682103 | 13450 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 275 | 10934414 + 44141093 | 13413 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 276 | (4215101 + 1) / 422 | 13384 | Jun 2022 | Florian Piesker | Generalized Wagstaff | click |
| 277 | 2295670 + 5670229 | 13381 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 278 | 2245685 + 5685224 | 13362 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 279 | Lucas(64063) / 464426465381142115542697818362662865912299 | 13347 | Aug 2024 | Serge Batalov | Lucas cofactor | click |
| 280 | See FactorDB for expression | 13343 | Aug 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(180090) |
click |
| 281 | p(141528106) | 13244 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 282 | p(141513546) | 13244 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 283 | p(141512238) | 13244 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 284 | 1935792 − 5792193 | 13238 | Feb 2023 | Youcef Lemsafer | - | click |
| 285 | p(141255053) | 13232 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 286 | M(44431) / M(283) / M(157) / 430619564833 | 13231 | Aug 2024 | Alex Kruppa | Mersenne cofactor | click |
| 287 | 6694682 + 4682669 | 13229 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 288 | p(141150528) | 13227 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 289 | p(141112026) | 13225 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 290 | p(141111278) | 13225 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 291 | See FactorDB for expression | 13217 | Aug 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(133962) |
click |
| 292 | p(140859260) | 13213 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 293 | p(140807155) | 13211 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 294 | p(140791396) | 13210 | Jul 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 295 | p(140760498) | 13208 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 296 | p(140710320) | 13206 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 297 | See FactorDB for expression | 13202 | Sep 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(134034) |
click |
| 298 | p(140593907) | 13201 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 299 | p(140560280) | 13199 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 300 | p(140552343) | 13199 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 301 | p(140535370) | 13198 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 302 | p(140533925) | 13198 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 303 | p(140519816) | 13197 | Jun 2022 | Charles H (Chuck) Lasher; David Broadhurst; Paul Underwood |
Partitions | click |
| 304 | 25723867 + 38672572 | 13188 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 305 | 19244015 + 40151924 | 13187 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 306 | See FactorDB for expression | 13186 | Nov 2024 | Alfred Reich | - | click |
| 307 | 1013172 + 22947 | 13173 | Aug 2024 | Alfred Reich | - | click |
| 308 | 1013170 + 2697 | 13171 | Aug 2024 | Alfred Reich | - | click |
| 309 | 1013162 + 87729 | 13163 | Aug 2024 | Alfred Reich | - | click |
| 310 | 1013161 + 51729 | 13162 | Aug 2024 | Alfred Reich | - | click |
| 311 | 1013160 + 11161 | 13161 | Aug 2024 | Alfred Reich | - | click |
| 312 | 1013159 + 1807 | 13160 | Aug 2024 | Alfred Reich | - | click |
| 313 | 29323789 + 37892932 | 13138 | Jan 2023 | Greg Childers | Leyland plus-form | click |
| 314 | 34293712 + 37123429 | 13123 | Dec 2022 | Anonymous | Leyland plus-form | click |
| 315 | 4614926 + 4926461 | 13122 | Dec 2022 | Anonymous | Leyland plus-form | click |
| 316 | 25803841 + 38412580 | 13105 | Dec 2022 | Florian Piesker | Leyland plus-form | click |
| 317 | (243502 + 221751 + 1) / 71426334276062353 | 13079 | Aug 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(130506) |
click |
| 318 | See FactorDB for expression | 13007 | Oct 2024 | Alfred Reich | - | click |
| 319 | 1013002 − 8 • 108 − 1 | 13002 | Dec 2023 | U.N.Owen | Near repdigit | click |
| 320 | 24453836 + 38362445 | 12998 | Dec 2022 | Greg Childers | Leyland plus-form | click |
| 321 | 21093908 + 39082109 | 12991 | Dec 2022 | Greg Childers | Leyland plus-form | click |
| 322 | 17783993 + 39931778 | 12977 | Aug 2022 | Greg Childers | Leyland plus-form | click |
| 323 | See FactorDB for expression | 12947 | Aug 2024 | Alex Kruppa | Mersenne cofactor of M(67235) | click |
| 324 | 21073894 + 38942107 | 12943 | Aug 2022 | Greg Childers | Leyland plus-form | click |
| 325 | (50233491 − 1) / 35068626 | 12913 | Mar 2023 | Youcef Lemsafer | Generalized repunit cofactor | click |
| 326 | 14674076 + 40761467 | 12907 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 327 | See FactorDB for expression | 12901 | Jan 2023 | Youcef Lemsafer | - | click |
| 328 | 10274278 + 42781027 | 12884 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 329 | 1595852 + 5852159 | 12883 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 330 | (242737 + 1) / 3 | 12865 | May 2022 | Greg Childers | Wagstaff | click |
| 331 | 20953858 + 38582095 | 12814 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 332 | See FactorDB for expression | 12814 | Aug 2024 | Alex Kruppa | Mersenne cofactor of M(48127) | click |
| 333 | (367 • 715118 − 1) / 6 | 12778 | Jun 2022 | Florian Piesker | Near redigit in base 7 | click |
| 334 | 242210 + 91549 | 12707 | Mar 2023 | Anonymous | - | click |
| 335 | (326633 + 1) / 4 | 12707 | Aug 2022 | Florian Piesker | Generalized Wagstaff | click |
| 336 | (77 • 1012720 − 41) / 80794157024576083501251 | 12699 | Mar 2023 | Youcef Lemsafer | - | click |
| 337 | (3499 • 1012689 − 1) / 3 | 12693 | Apr 2023 | Florian Piesker | - | click |
| 338 | 16893926 + 39261689 | 12672 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 339 | 24823729 + 37292482 | 12660 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 340 | (4994691 − 1) / 498 | 12655 | Jun 2022 | Florian Piesker | Generalized repunit | click |
| 341 | 2575248 + 5248257 | 12648 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 342 | M(53977) / M(701) / M(7711) / M(4907) / M(77) • 259969 | 12644 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(53977) | click |
| 343 | 13784023 + 40231378 | 12630 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 344 | (26383687 + 36872638) / 530650435937411 | 12600 | Mar 2023 | Youcef Lemsafer | Leyland plus-form cofactor | click |
| 345 | (2055449 + 1) / 206 | 12595 | Jun 2022 | Florian Piesker | Generalized Wagstaff | click |
| 346 | (2305333 − 1) / 229 | 12593 | Jun 2022 | Florian Piesker | Generalized repunit | click |
| 347 | R(12611) / 151596145122775505868566782271 | 12581 | Sep 2024 | Alfred Reich | Repunit cofactor | click |
| 348 | See FactorDB for expression | 12558 | Jan 2023 | Youcef Lemsafer | - | click |
| 349 | (239509 − 1) / (23257 − 1) / 11002902177363902238826201639790642566112031151441 | 12550 | Mar 2023 | Youcef Lemsafer | Generalized repunit cofactor | click |
| 350 | (241614 + 220807 + 1) / 231896371365555042937 | 12507 | Jul 2024 | Alex Kruppa | - | click |
| 351 | (8 • 1012527 − 11) / 66426466217992706366987547351 | 12500 | Feb 2023 | Youcef Lemsafer | - | click |
| 352 | 26133650 + 36502613 | 12473 | Jul 2022 | Greg Childers | Leyland plus-form | click |
| 353 | 35123512 + 33 | 12452 | May 2025 | Tengfei Wang | Lifchitz plus-form | click |
| 354 | 10504096 + 10134096 | 12375 | Jan 2023 | Youcef Lemsafer | - | click |
| 355 | 30523543 + 35433052 | 12346 | May 2022 | Greg Childers | Leyland plus-form | click |
| 356 | 23893646 + 36462389 | 12317 | May 2022 | Greg Childers | Leyland plus-form | click |
| 357 | 25773602 + 36022577 | 12287 | May 2022 | Greg Childers | Leyland plus-form | click |
| 358 | 31723507 + 35073172 | 12280 | May 2022 | Greg Childers | Leyland plus-form | click |
| 359 | 13253924 + 39241325 | 12252 | May 2022 | Greg Childers | Leyland plus-form | click |
| 360 | (1211353 +1) / 13 | 12251 | Aug 2022 | Florian Piesker | Generalized Wagstaff | click |
| 361 | (23671 • 1012192 − 1) / 9 | 12196 | Apr 2022 | Florian Piesker | - | click |
| 362 | M(55495) / M(11099) / M(5045) • M(1009) / 567767102431 | 12138 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(55495) | click |
| 363 | 5354444 + 4444535 | 12125 | May 2022 | Greg Childers | Leyland plus-form | click |
| 364 | 239999 + 1411862543 | 12041 | Oct 2023 | Frank Doornink | Part of smallest 40000-bit prime twin | click |
| 365 | 239999 + 1411862541 | 12041 | Oct 2023 | Frank Doornink | Part of smallest 40000-bit prime twin | click |
| 366 | 239999 + 18065 | 12041 | Jul 2023 | Oliver Kruse | Smallest 40000-bit prime | click |
| 367 | (714221 − 1) / 6 | 12018 | Aug 2022 | Florian Piesker | Generalized repunit | click |
| 368 | 417440 + 952 | 12000 | Mar 2024 | Edwin Hall | - | click |
| 369 | 397542 − 98 | 12000 | Mar 2024 | Edwin Hall | - | click |
| 370 | (2235110 − 405) / 4 | 12000 | Mar 2024 | Edwin Hall | - | click |
| 371 | 1011999 + 76621 | 12000 | Oct 2023 | U.N.Owen | - | click |
| 372 | 1011999 + 72577 | 12000 | Jan 2023 | Frank Doornink | - | click |
| 373 | 1012000 − 11319 | 12000 | Dec 2023 | U.N.Owen | - | click |
| 374 | 1011999 + 12757 | 12000 | Jan 2024 | U.N.Owen | - | click |
| 375 | M(42991) / M(3307) / M(13) | 11943 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(42991) | click |
| 376 | 30703423 + 34233070 | 11937 | May 2022 | Greg Childers | Leyland plus-form | click |
| 377 | 976006 − 600697 | 11933 | Apr 2025 | Tengfei Wang | Leyland minus-form | click |
| 378 | (886 • 199291 − 1) / 3 | 11884 | Jun 2022 | Florian Piesker | - | click |
| 379 | 1310633 − 50 | 11845 | Jun 2022 | Florian Piesker | - | click |
| 380 | 298096 + 10 | 11840 | Jul 2022 | Florian Piesker | - | click |
| 381 | (313 • 324761 − 1) / 2 | 11817 | Jul 2022 | Florian Piesker | - | click |
| 382 | (4589 • 516892 − 1) / 4 | 11811 | Dec 2022 | Anonymous | - | click |
| 383 | 3 • 1011799 − 37 | 11800 | Mar 2023 | Youcef Lemsafer | - | click |
| 384 | (22683515 + 35152268) / 787343 | 11790 | Feb 2023 | Youcef Lemsafer | Leyland plus-form cofactor | click |
| 385 | M(58389) / M(19463) / 501545671318332018168553 | 11695 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(58389) | click |
| 386 | 14073712 + 37121407 | 11687 | May 2022 | Greg Childers | Leyland plus-form | click |
| 387 | 25603423 + 34232560 | 11667 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 388 | 22483469 + 34692248 | 11628 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 389 | (29153354 + 33542915) / 16793707319901665479 | 11602 | Apr 2023 | Youcef Lemsafer | Leyland plus-form cofactor | click |
| 390 | 26693378 + 33782669 | 11575 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 391 | (516519 − 1) / 4 | 11546 | Aug 2022 | Florian Piesker | Generalized repunit | click |
| 392 | See FactorDB for expression | 11522 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(62439) | click |
| 393 | 21973442 + 34422197 | 11503 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 394 | 1975000 − 5000197 | 11473 | Sep 2024 | Oliver Kruse | Leyland minus-form | click |
| 395 | (22213422 − 34222221) / 11 | 11451 | Dec 2023 | U.N.Owen | Leyland minus-form cofactor | click |
| 396 | See FactorDB for expression | 11377 | Sep 2025 | Serge Batalov | - | click |
| 397 | See FactorDB for expression | 11377 | Aug 2025 | Serge Batalov | - | click |
| 398 | (201 • 1415279 − 1) / 20 | 11347 | Jun 2022 | Florian Piesker | - | click |
| 399 | (4327 • 1011330 − 7) / 9 | 11333 | Jun 2022 | Florian Piesker | - | click |
| 400 | (1110867 − 1) / 10 | 11316 | Aug 2022 | Florian Piesker | Generalized repunit | click |
| 401 | 15163557 + 35571516 | 11314 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 402 | 1137 • 367259 + 19 | 11301 | Apr 2023 | Florian Piesker | - | click |
| 403 | 4964189 + 4189496 | 11292 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 404 | 9223805 + 3805922 | 11281 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 405 | 4724217 + 4217472 | 11277 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 406 | 13249 • 248131 − 49 | 11227 | Jun 2022 | Florian Piesker | - | click |
| 407 | 7653892 + 3892765 | 11224 | Jun 2022 | Paul Leyland | Leyland plus-form | click |
| 408 | 19663395/ + 33951966 | 11182 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 409 | See FactorDB for expression | 11155 | Jul 2024 | Alex Kruppa | - | click |
| 410 | (19 • 1011149 + 611) / 9 | 11150 | Jul 2024 | Alfred Reich | - | click |
| 411 | 31823182 + 33 | 11146 | May 2025 | Tengfei Wang | Lifchitz plus-form | click |
| 412 | M(47435) • M(179) • M(53) • M(5) / M(9487) / M895) / M(265) | 11146 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(47435) | click |
| 413 | 29423213 + 32132942 | 11145 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 414 | (3134451 + 1) / 314 | 11106 | Jun 2022 | Florian Piesker | Generalized Wagstaff | click |
| 415 | 179021 + 25 | 11100 | Jun 2022 | Florian Piesker | - | click |
| 416 | (5034093 − 1) / 502 | 11055 | May 29 | Tom Wu | Generalized repunit | click |
| 417 | (17 • 1011046 + 7) / 3 | 11047 | Aug 2023 | Markus Tervooren | - | click |
| 418 | 24823243 + 32432482 | 11010 | May 2022 | Greg Childers | Leyland plus-form | click |
| 419 | 1011000 + 11973 | 11001 | Jul 2024 | Alfred Reich | - | click |
| 420 | 1010999 + 24439 | 11000 | Nov 2023 | U.N.Owen | - | click |
| 421 | (133 • 1005496 − 1) / 33 | 10993 | Jun 2022 | Florian Piesker | - | click |
| 422 | 12623543 + 35431262 | 10988 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 423 | 27813188 + 31882781 | 10981 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 424 | 30893142 + 31423089 | 10966 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 425 | 13303509 + 35091330 | 10962 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 426 | 995488 + 548899 | 10953 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 427 | 17663369 + 33691766 | 10940 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 428 | (4794079 + 1) / 480 | 10931 | Jun 2022 | Florian Piesker | Generalized Wagstaff | click |
| 429 | 5393996 + 3996539 | 10916 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 430 | (64 • 1010906 + 53) / 9 | 10907 | May 2022 | Greg Childers | Palindrome | click |
| 431 | 30703121 + 31213070 | 10884 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 432 | 12713502 + 35021271 | 10871 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 433 | (237651 + 1) / (21637 + 1) / 2796203 | 10835 | Jul 2024 | Alex Kruppa | Wagstaff cofactor | click |
| 434 | 347035 + 703534 | 10774 | May 2022 | Greg Childers | Leyland plus-form | click |
| 435 | 5793896 + 3896579 | 10764 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 436 | 21183217 + 32172118 | 10700 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 437 | 2984309 + 4309298 | 10662 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 438 | 11733470 + 34701173 | 10651 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 439 | 17553268 + 32681755 | 10603 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 440 | (19 • 1010613 − 73) / 20376889065137331 | 10598 | Jul 2024 | Alfred Reich | - | click |
| 441 | 1010584 + 26191 | 10585 | Aug 2024 | Alfred Reich | - | click |
| 442 | (19 • 1010554 + 341) / 9 | 10555 | Jul 2024 | Alfred Reich | - | click |
| 443 | 21193160 + 31602119 | 10511 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 444 | (129739 − 1) / 11 | 10510 | Jul 2022 | Florian Piesker | Generalized repunit | click |
| 445 | 24473100 + 31002447 | 10505 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 446 | 1010470 + 3 | 10471 | Aug 2022 | Florian Piesker | - | click |
| 447 | 12093392 + 33921209 | 10456 | May 2022 | Greg Childers | Leyland plus-form | click |
| 448 | 26613052 − 30522661 | 10454 | Jun 2025 | Tengfei Wang | Leyland minus-form | click |
| 449 | 29183013 − 30132918 | 10441 | Jun 2025 | Tengfei Wang | Leyland minus-form | click |
| 450 | 16783225 + 32251678 | 10400 | May 2022 | Greg Childers | Leyland plus-form | click |
| 451 | 17723201 + 32011772 | 10399 | May 2022 | Greg Childers | Leyland plus-form | click |
| 452 | (82 • 1010394 + 71) / 9 | 10395 | Nov 2023 | Richard G. | Palindrome | click |
| 453 | 19663155 + 31551966 | 10392 | May 2022 | Anonymous | Leyland plus-form | click |
| 454 | (2 • 1010391 + 61) / 9 | 10391 | Jan 2023 | Anonymous | Near repdigit | click |
| 455 | (419 • 712274 − 5) / 6 | 10375 | Sep 2022 | Florian Piesker | - | click |
| 456 | 1010371 + 24679 | 10372 | Aug 2024 | Alfred Reich | - | click |
| 457 | 1010370 + 7891 | 10371 | Aug 2024 | Alfred Reich | - | click |
| 458 | 1010369 + 20863 | 10370 | Aug 2024 | Alfred Reich | - | click |
| 459 | 27693008 − 30082769 | 10355 | Jun 2025 | Tengfei Wang | Leyland minus-form | click |
| 460 | 17483193 − 31931748 | 10354 | Feb 2024 | Tengfei Wang | Leyland minus-form | click |
| 461 | See FactorDB for expression | 10350 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(47575) | click |
| 462 | 24483053 − 30532448 | 10347 | Jun 2025 | Tengfei Wang | Leyland minus-form | click |
| 463 | 6 • Bern(4306) / 2153 | 10342 | Jun 2022 | Greg Childers | Irregular | click |
| 464 | 29172982 − 29822917 | 10333 | Jun 2025 | Tengfei Wang | Leyland minus-form | click |
| 465 | 8513522 + 3522851 | 10320 | May 2022 | Paul Leyland | Leyland plus-form | click |
| 466 | 2124431 − 4431212 | 10308 | Jun 2023 | Florian Piesker | Leyland minus-form | click |
| 467 | See FactorDB for expression | 10305 | May 2024 | Richard G. | - | click |
| 468 | See FactorDB for expression | 10300 | Sep 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(119994) |
click |
| 469 | (4341 • 514720 − 1) / 4 | 10292 | Oct 2022 | Anonymous | - | click |
| 470 | 19513128 − 31281951 | 10292 | Jun 2023 | Florian Piesker | Leyland minus-form | click |
| 471 | (158741 − 1) / 14 | 10280 | Jul 2022 | Florian Piesker | Generalized repunit | click |
| 472 | 613206 + 217 | 10277 | Feb 2024 | Florian Piesker | - | click |
| 473 | 59056921173 • 234030 + 7 | 10255 | Jun 2022 | Greg Childers | Part of sexy prime pair | click |
| 474 | 6973594 + 3594697 | 10219 | May 2022 | Greg Childers | Leyland plus-form | click |
| 475 | 10613372 − 33721061 | 10203 | Jun 2023 | Florian Piesker | Leyland minus-form | click |
| 476 | (191 • 1055045 + 1) / 8 | 10199 | Jun 2022 | Florian Piesker | - | click |
| 477 | 8123505 − 3505812 | 10198 | Jun 2023 | Florian Piesker | Leyland minus-form | click |
| 478 | See FactorDB for expression | 10195 | Jul 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(103206) |
click |
| 479 | 22313042 + 30422231 | 10187 | May 2022 | Oliver Kruse | Leyland plus-form | click |
| 480 | 24293000 − 30002429 | 10157 | Jun 2023 | Florian Piesker | Leyland minus-form | click |
| 481 | 15433178 + 31781543 | 10133 | May 2022 | Paul Leyland | Leyland plus-form | click |
| 482 | M(42145) / M(8429) / 13604811874892518060205885792305751 | 10116 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(42145) | click |
| 483 | 11413308 − 33081141 | 10114 | Jun 2023 | Florian Piesker | Leyland minus-form | click |
| 484 | 12343265 + 32651234 | 10094 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 485 | See FactorDB for expression | 10081 | Jun 2022 | David Broadhurst | - | click |
| 486 | (29092910 − 29102909) / 41 | 10078 | Jan 2023 | Youcef Lemsafer | Leyland minus-form cofactor | click |
| 487 | 27392930 + 29302739 | 10073 | Jun 2022 | Greg Childers | Leyland plus-form | click |
| 488 | See FactorDB for expression | 10068 | Jul 2024 | Alex Kruppa | Cyclotomic polynomial cofactor of M(117222) |
click |
| 489 | 2072644824759 • 233333 + 5 | 10047 | Jun 2022 | Greg Childers | Part of first known gigantic prime triplet re-certified via CM |
click |
| 490 | 6483571 + 3571648 | 10041 | May 2022 | Greg Childers | Leyland plus-form | click |
| 491 | 19813042 − 30421981 | 10030 | May 2023 | Anonymous | Leyland minus-form | click |
| 492 | 1010020 + 16657 | 10021 | Aug 2024 | Alfred Reich | - | click |
| 493 | 1010020 − 237 | 10020 | Aug 2024 | Alfred Reich | - | click |
| 494 | 28942894 + 20532053 | 10018 | May 2024 | Oliver Kruse | Leyland plus-form | click |
| 495 | See FactorDB for expression | 10014 | Jul 2024 | Alex Kruppa | Mersenne cofactor of M(42679) | click |
| 496 | 1010001 + 28331593 | 10002 | May 2024 | Anonymous | - | click |
| 497 | 515857 − 505857 | 10002 | Apr 2025 | Anonymous | Oakes | click |
| 498 | 1010000 + 165031 | 10001 | Aug 2024 | Alfred Reich | - | click |
| 499 | 1010000 + 1017363 | 10001 | Aug 2024 | Alfred Reich | - | click |
| 500 | 1010000 + 65277 | 10001 | Oct 2023 | U.N.Owen | - | click |
| 501 | 12843217 − 12833217 | 10001 | Apr 2025 | Anonymous | Oakes | click |
| 502 | 1010000 + 28579 | 10001 | Oct 2023 | U.N.Owen | - | click |
| 503 | (52 • 1010000 + 11) / 9 | 10001 | Mar 2023 | Youcef Lemsafer | - | click |
| 504 | 233217 + 111 | 10000 | May 2022 | Anonymous | - | click |
| 505 | 1010000 − 47717 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 506 | 1010000 − 322497 | 10000 | Sep 2024 | Alfred Reich | - | click |
| 507 | See FactorDB for expression | 10000 | Aug 2024 | Alfred Reich | Leyland plus-form cofactor | click |
| 508 | 1010000 − 22403 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 509 | (237371 + 397) / 41745703454270394607773342228304835316 | 10000 | Jul 2024 | Alfred Reich | - | click |
| 510 | See FactorDB for expression | 10000 | Aug 2024 | Alfred Reich | - | click |
| 511 | 109999 + 194011932123 | 10000 | Jun 2023 | Oliver Kruse | Part of the smallest gigantic triplet to pattern d = 0, 4, 6 |
click |
| 512 | 109999 + 194011932121 | 10000 | Jun 2023 | Oliver Kruse | Part of the smallest gigantic triplet to pattern d = 0, 4, 6 |
click |
| 513 | 109999 + 194011932117 | 10000 | Jun 2023 | Oliver Kruse | Part of the smallest gigantic triplet to pattern d = 0, 4, 6 |
click |
| 514 | 109999 + 274366375363 | 10000 | Jun 2023 | Oliver Kruse | Part of the smallest gigantic triplet to pattern d = 0, 2, 6 |
click |
| 515 | 109999 + 274366375359 | 10000 | Jun 2023 | Oliver Kruse | Part of the smallest gigantic triplet to pattern d = 0, 2, 6 |
click |
| 516 | 109999 + 274366375357 | 10000 | Jun 2023 | Oliver Kruse | Part of the smallest gigantic triplet to pattern d = 0, 2, 6 |
click |
| 517 | (237344 + 231) / 8 | 10000 | Jul 2022 | Florian Piesker | - | click |
| 518 | (33875430588693094381512 + 1) / 2 | 10000 | Aug 2024 | Alfred Reich | GFN-9 cofactor | click |
| 519 | (33875430588693055871512 + 1) / 2 | 10000 | Aug 2024 | Alfred Reich | GFN-9 cofactor | click |
| 520 | 1309747264300589758110032419673347620959731068338635399869049806286716959555931128 + 2 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 521 | 109999 + 70999 | 10000 | Oct 2023 | U.N.Owen | - | click |
| 522 | 109999 + 78571 | 10000 | Nov 2024 | Alfred Reich | - | click |
| 523 | ((11476 • 1035 + 4113)256 + 1) / 2 | 10000 | Aug 2024 | Alfred Reich | GFN-8 cofactor | click |
| 524 | 109999 + 780199 | 10000 | Jul 2024 | Alfred Reich | - | click |
| 525 | 233216 + 281577 | 10000 | Mar 2023 | Youcef Lemsafer | - | click |
| 526 | (1010000 − 1) / 9 + 7 • 10885 | 10000 | Aug 2024 | Alfred Reich | Near repdigit | click |
| 527 | Fib(47847) + 26679 | 10000 | Jul 2024 | Alfred Reich | - | click |
| 528 | Fib(47850) + 20841 | 10000 | Dec 2023 | Tengfei Wang | - | click |
| 529 | 10 • (104999 + 520488)2 + 7 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 530 | 10 • (104999 + 517910)2 + 7 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 531 | 10 • (104999 + 86414)2 + 7 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 532 | 109999 + 21870245691511147257 | 10000 | Jul 2024 | Alfred Reich | - | click |
| 533 | 894297 • 109994 + 711826
| 10000 |
Aug 2024 |
Alfred Reich |
- |
click |
|
| 534 | 631101 • 109994 + 711826 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 535 | 299667 • 109994 + 711826 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 536 | 240708 • 109994 + 711826 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 537 | 109999 + 7066834558999 | 10000 | Aug 2024 | Alfred Reich | - | click |
| 538 | 109999 + 11147257 | 10000 | May 2022 | Anonymous | - | click |
| 539 | 233217 − 721155 | 10000 | Mar 2024 | Edwin Hall | - | click |
| 540 | 233219 − 52545 | 10000 | Jul 2024 | Alfred Reich | - | click |