Twin Primes
Last updated: 06 March 2024
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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)