Twin Primes

 Last updated: 06 March 2024

First known with more than 300000 digits
2996863034895 · 21290000 ± 1 (388342 digits, Sep 2016, Tom Greer, TwinGen, PrimeGrid, LLR)

First known with more than 200000 digits
3756801695685 · 2666669 ± 1 (200700 digits, Dec 2011, Timothy Winslow, TwinGen, PrimeGrid, LLR)

First known with more than 100000 digits
65516468355 · 2333333 ± 1 (100355 digits, Aug 2009, Peter Kaiser, NewPGen, PrimeGrid, TPS, LLR)

160204065 · 2262148 ± 1 (78923 digits, Aug 2021, Erwin Doescher, LLR)

18936119858192 - 18936119854096 ± 1 (76000 digits, 06 Mar 2024, Bruce Marler; Cyclo; PRST)

15891732708192 - 15891732704096 ± 1 (75376 digits, 24 Feb 2024, Frank Doornink; Cyclo; PRST)

9960942348192 - 9960942344096 ± 1 (73715 digits, 26 Jan 2024, Roman Trunov, Cyclo, PRST)

8957215318192 - 8957215314096 ± 1 (73337 digits, 26 Jan 2024, Matthias Baur, Cyclo, PRST)

7955076968192 - 7955076964096 ± 1 (72915 digits, 21 Jan 2024, Rob Gahan; Cyclo; PRST)

6915957608192 - 6915957604096 ± 1 (72417 digits, 13 Jan 2024, Bruce Marler; Cyclo; PRST)

6470208268192 - 6470208264096 ± 1 (72180 digits, 16 Jan 2024, Rob Gahan; Cyclo; PRST)

6298136548192 - 6298136544096 ± 1 (72084 digits, 09 Jan 2024, Rob Gahan; Cyclo; PRST)

5049833348192 - 5049833344096 ± 1 (71298 digits, 05 Jan 2024, Matthias Baur, Cyclo, PRST)

3143057258192 - 3143057254096 ± 1 (69611 digits, 22 Dec 2023, Matthias Baur, Cyclo, PRST)

1845340868192 - 1845340864096 ± 1 (67716 digits, 9 Dec 2023, Rob Gahan, Cyclo, PRST)

14279340881715 · 2222333 ± 1 (66943 digits, 07 Nov 2023, Stephan Vink; Oliver Kruse; Michael Kwok; TwinGen; NewPGen; Twin Prime Search; LLR)

12770275971 · 2222225 ± 1 (66907 digits, Jul 2017, Bo Tornberg, TwinGen, LLR TWIN)

12599682117 · 2211088 ± 1 (63554 digits, 22 Feb 2022, Michael Kwok, PSieve, LLR)

12566577633 · 2211088 ± 1 (63554 digits, 22 Feb 2022, Michael Kwok, PSieve, LLR)

70965694293 · 2200006 ± 1 (60219 digits, Apr 2016, S. Urushihata)

66444866235 · 2200003 ± 1 (60218 digits, Apr 2016, S. Urushihata)

4884940623 · 2198800 ± 1 (59855 digits, Jul 2015, Michael Kwok, PSIEVE, LLR )

2003663613 · 2195000 ± 1 (58711 digits, Jan 2007, Eric Vautier, Dmitri Gribenko, Patrick W. McKibbon, Michaek Kwok, Andrea Pacini, Rytis Slatkevicius)

17976255129 · 2183241 ± 1 (55172 digits, May 2021, Frank Doornink, TwinGen, OpenPFGW)

191547657 · 2173372 ± 1 (52199 digits, Nov 2020, Stephan Schöler Eric Vautier, MULTISIEVE, LLR)

38529154785 · 2173250 ± 1 (52165 digits, Jul 2014, Serge Batalov, NewPGen, LLR)

893319633 · 2172110 ± 1 (51820 digits, 01 Jan 2024, Serge Batalov; NewPGen; OpenPFGW)

194772106074315 · 2171960 ± 1 (51780 digits, June 2007, Antal Járai, Gabor Farkas, Timea Csajbok & János Kasza)

100314512544015 · 2171960 ± 1 (51780 digits, June 2006, Antal Járai, Gabor Farkas, Timea Csajbok & János Kasza)

16869987339975 · 2171960 ± 1 (51779 digits, Sep 2005, Antal Járai, Gabor Farkas, Timea Csajbok & János Kasza)

First known with more than 50000 digits
33218925 · 2169690 ± 1 (51090 digits, Sep 2002, Daniel Papp)

268981272 · 569421 ± 1 (48532 digits, 09 Feb 2023, Ruben Steinberg, NewPGen, LLR)

110427610 · 3100003 ± 1 (47722 digits, Feb 2021, Frank Doornink)

3706785456 · 1342069 ± 1 (46873 digits, Sep 2020, Robert Gelhar)

22835841624 · 754321 ± 1 (45917 digits, Nov 2010, Peter Kaiser)

1679081223 · 2151618 ± 1 (45651 digits, Feb 2012, Bo Tornberg, TwinGen, LLR)

9606632571 · 2151515 ± 1 (45621 digits, Jul 2014, Tapio Rajala)

773985 · 2150559 ± 1 (45329 digits, Jan 2021, Erwin Doescher)

84966861 · 2140219 ± 1 (42219 digits, Jun 2012, Michael Kwok, NewPGen, TPS, LLR)

12378188145 · 2140002 ± 1 (42155 digits, Dec 2010, S. Urushihata)

23272426305 · 2140001 ± 1 (42155 digits, Dec 2010, S. Urushihata)

8151728061 · 2125987 ± 1 (37936 digits, May 2010, Dirk Augustin, NewPgen OpenPFGW)

21799 · 3137 · 474579581429465 · 443749004359326 · 644541865141488 · 561014826899421
· 725590842793493 · 623163115793476 · 383657519591332 ± 1 (35851 digits, Dec 2013, Jeff Kinne, OpenPFGW)

598899 · 2118987 ± 1 (35825 digits, Jan 2010, Tom Wu)

307259241 · 2115599 ± 1 (34808 digits, Jan 2009, Tornberg, PRP & PROTH)

60194061 · 2114689 ± 1 (34533 digits, Nov 2002, Underbakke)

1377337125153 · 2114488 ± 1 (34477 digits, May 2015, Peter Kaiser, LLR, OpenPFGW)

5558745 · 1033334 ± 1 (33341 digits, Apr 2011, Stefano D'Urso)

108615 · 2110342 ± 1 (33222 digits, Jun 2008, Chris Chatfield)

1765199373 · 2107520 ± 1 (32376 digits, Oct 2002, McElhatton)

First known with more than 30000 digits
318032361 · 2107001 ± 1 (32220 digits, May 2001, Underbakke & Carmody)

4501763715 · 2100006 ± 1 (30115 digits, Dec 2009, S. Urushihata)

34776437961 · 2100001 ± 1 (30114 digits, Dec 2009, S. Urushihata)

156733989 · 2100007 ± 1 (30114 digits, Dec 2008, S. Urushihata)

1046619117 · 2100000 ± 1 (30113 digits, Oct 2007, Gary Barnes)

1807318575 · 298305 ± 1 (29603 digits, Mar 2001, David Underbakke & Phil Carmody)

744678855 · 295000 ± 1 (28607 digits, Aug 2009, Vogel)

23321624 · 353005 ± 1 (25298 digits, Dec 2009, Chatfield)

1035928263 · 283200 ± 1 (25055 digits, Nov 2009, Mike Oakes)

7473214125 · 283125 ± 1 (25033 digits, Feb 2006, Underbakke)

11694962547 · 283124 ± 1 (25033 digits, Feb 2006, Underbakke)

58950603 · 283130 ± 1 (25033 digits, Feb 2006, Underbakke)

1030739199 · 282019 ± 1 (24700 digits, Jan 2009, Mario Gaspar Neves, NewPgen, Proth)

5583295473 · 280828 ± 1 (24342 digits, Jan 2006, Tornberg)

134583 · 280828 ± 1 (24337 digits, Jun 2005, David Underbakke)

665551035 · 280025 ± 1 (24099 digits, 28 Nov 2000, David Underbakke & Phil Carmody)

16491 · 270151 ± 1 (21122 digits, Sep 2008, Carel Hendrik van der Westhuizen)

1046886225 · 270000 ± 1 (21082 digits, Sep 2004, Predrag Minovic)

1294767 · 267708 ± 1 (20389 digits, Apr 2008, David Metcalfe)

8544353655 · 266666 ± 1 (20079 digits, Dec 2005, Daniel Heuer)

8179665447 · 266666 ± 1 (20079 digits, Jan 2006, Daniel Heuer)

6968409117 · 266666 ± 1 (20079 digits, Dec 2005, Daniel Heuer)

5798425587 · 266666 ± 1 (20079 digits, Dec 2005, Daniel Heuer)

4078559583 · 266666 ± 1 (20079 digits, Dec 2005, Daniel Heuer)

1940734185 · 266445 ± 1 (20012 digits, Feb 2004, Bo Tornberg)

781134345 · 266445 ± 1 (20011 digits, Apr 2001, David Underbakke, Phil Carmody, Chris Nash)

First known with more than 20000 digits
1693965 · 266443 ± 1 (20008 digits, 26 Sep 2000, Giovanni La Barbera, Paul Jobling, Yves Gallot)

Smallest with 20000 digits
1019999 + 1514722610 ± 1 (20000 digits, 05 Jun 2021, Norman Luhn, OpenPFGW, NewPGen; 25 Jun 2022, Paul Underwood, CM)

409826235 · 265432 ± 1 (19706 digits, Nov 2005, Shusuke Kubota)

83475759 · 264955 ± 1 (19562 digits, Oct 2000, David Underbakke, Paul Jobling, Yves Gallot)

37831341 · 261777 ± 1 (18605 digits, Dec 2003, Michael Richard Eaton)

1014561345 · 261204 ± 1 (18434 digits, Jul 2004, Bo Xiao)

291889803 · 260090 ± 1 (18098 digits, May 2001, Didier Boivin)

4648619711505 · 260000 ± 1 (18075 digits, Mar 2000, K-H. Indlekofer & A. Járai)

2409110779845 · 260000 ± 1 (18075 digits, Jan 2000, K-H. Indlekofer & A. Járai)

47280435 · 254322 ± 1 (16361 digits, Mar 2005, Masanori Hirotomo)

488162409 · 253333 ± 1 (16064 digits, Apr 2004, Daniel Heuer)

332494785 · 251111 ± 1 (15395 digits, Aug 2004, Toshihiro Ohigashi)

168030135 · 251111 ± 1 (15395 digits, Jul 2004, Toshihiro Ohigashi)

419703 · 250508 ± 1 (15211 digits, Dec 2004, Thomas Masser)

2230907354445 · 248000 ± 1 (14462 digits, Dec 1999, Indlekofer, Jarai, Wassing)

871892617365 · 248000 ± 1 (14462 digits, Dec 1999, Indlekofer, Jarai, Wassing)

160675905 · 242004 ± 1 (12653 digits, Apr 2003, Claude Abraham)

1186468455 · 241537 ± 1 (12513 digits, Dec 2003, David Underbakke)

1902519837 · 241536 ± 1 (12513 digits, Dec 2003, David Underbakke)

65548665 · 241157 ± 1 (12398 digits, Dec 2003, David Underbakke)

3064339917 · 241088 ± 1 (12379 digits, Dec 2003, David Underbakke)

785206293 · 239020 ± 1 (11756 digits, Mar 2003, Bo Tornberg)

361700055 · 239020 ± 1 (11755 digits, Jan 1999, Henri Lifchitz)

835335 · 239014 ± 1 (11751 digits, September 1998, Ray Ballinger & Yves Gallot)

First known with more than 10000 digits
242206083 · 238880 ± 1 (11713, Nov 1995, H. K. Indlekofer & A. Járai )

Smallest with 10000 digits
109999 + 2421018652 ± 1 (10000 digits, Dec 2009, Dirk Augustin; Jun 2021 Norman Luhn, Primo)

40883037 · 223456 ± 1 (7069 digits, Aug 1998, Henri Lifchitz)

843753 · 222222 ± 1 (6696 digits, Nov 1997, Carlos Bernardo Rivera Fernández)

709425 · 220025 ± 1 (6034 digits, Jan 2000, Didier Boivin & Y. Gallot)

Smallest with 20000 bits
219999 + 168863242 ± 1 (6021 digits, 08 Jul 2023, Norman Luhn; Oliver Kruse, CM )

8182815 · 217838 ± 1 (5377 digits, Jan 1998, Smith and Gallot)

570918348 · 105120 ± 1 (5129 digits, Oct 1995, Harvey Dubner)

697053813 · 216352 ± 1 (4932, Mar 1995, H. K. Indlekofer & A. Járai)

6797727 · 215328 ± 1 (4622 digits, 25 Jul 1995, Tony Forbes)

1692923232 · 104020 ± 1 (4030 digits, Jul 1993, Harvey Dubner)

4655478828 · 103429 ± 1 (3439 digits, Dec 1989, Harvey Dubner)

1706595 · 211235 ± 1 (3389 digits, 7 Jun 1989, John Brown, Landon Curt Noll, Bodo Parady, Gene Smith, Joel Smith, Sergio Zarantonello [Amdahl 6 Team])

594501 · 29999 ± 1 (3016 digits, Nov 1997, Carlos Bernardo Rivera Fernández)

Smallest with 10000 bits
29999 + 79969000 ± 1 (3010 digits, 04 Jul 2023, Norman Luhn; Oliver Kruse, CM )

459 · 28529 ± 1 (2571 digits, Dec 1993, Harvey Dubner)

1171452282 · 102490 ± 1 (2500 digits, Dec 1991, Harvey Dubner)

571305 · 27701 ± 1 (2324 digits, 30 May 1989, John Brown, Landon Curt Noll, Bodo Parady, Gene Smith, Joel Smith, Sergio Zarantonello [Amdahl 6 Team])

75188117004 · 102298 ± 1 (2309 digits, Dec 1989, Harvey Dubner)

663777 · 27650 ± 1 (2309 digits, 30 May 1989, John Brown, Landon Curt Noll, Bodo Parady, Gene Smith, Joel Smith, Sergio Zarantonello [Amdahl 6 Team])

107570463 · 102250 ± 1 (2259 digits, Dec 1985, Harvey Dubner)

43690485351513 · 101995 ± 1 (2009 digits, Dec 1985, Harvey Dubner)

260497545 · 26625 ± 1 (2003 digits, Dec 1984, A. Oliver L. Atkin, Neil W. Rickert)

101430 + 41038683014 · 10710 ± 1 (1431 digits, Dec 1990, Harvey Dubner)

519912 · 101420 ± 1 (1426 digits, Dec 1984, Harvey Dubner)

217695 · 101404 ± 1 (1410 digits, Dec 1984, Harvey Dubner)

219649815 · 24481 ± 1 (1358 digits, Dec 1983, A. Oliver L. Atkin, Neil W. Rickert)

1639494 · (24423 - 1) ± 1 (1338 digits, Dec 1983, Wilfrid Keller)

2445810 · (24253 - 1) ± 1 (1287 digits, Dec 1983, Wilfrid Keller)

218313 · 101068 ± 1 (1074 digits, Dec 1985, Harvey Dubner)

499032 · 101040 ± 1 (1046 digits, Dec 1984, Harvey Dubner)

First known with more than 1000 digits
256200945 · 23426 ± 1 (1040 digits, Dec 1980, A. Oliver L. Atkin, Neil W. Rickert)

Smallest with 1000 digits
10999 + 1975082 ± 1 (1000 digits, Oct 1999, Daniel Heuer)

1159142985 · 22304 ± 1 (703 digits, 1979/1980, A. Oliver L. Atkin, Neil W. Rickert)

347251905 · 22305 ± 1 (703 digits, 1979/1980, A. Oliver L. Atkin, Neil W. Rickert)

291 · 21553 ± 1 (470 digits, ~1980, Wilfrid Keller)

1065 · 21321 ± 1 (401 digits, ~1980, Wilfrid Keller)

1035 · 21156 ± 1 (352 digits, ~1980, Wilfrid Keller)

177 · 21032 ± 1 (313 digits, ~1980, Wilfrid Keller)

1365 · 2829 ± 1 (253 digits, ~1980, Wilfrid Keller)

315 · 2767 ± 1 (234 digits, ~1980, Wilfrid Keller)

213 · 2726 ± 1 (221 digits, ~1980, Wilfrid Keller)