k Digits Early discovery with at least 1,000 digits to given pattern Who When
1 1332 24432 − 1 Alexander Hurwitz 3 Nov 1961
2 1040 256200945 • 23426 ± 1 Arthur Oliver Lonsdale Atkin & Neil W. Rickert Dec 1980
3 1041 23456 + 5661177712051 + d d = 0, 2, 6 Tony Forbes (PRP); François Morain (proven primes) 1995 - 1998
3 1083 437850590 • (23567 − 21189) − 6 • 21189 − 5 + d d = 0, 4, 6 Tony Forbes 04 Dec 1996
4 1004 76912895956636885 • (23279 − 21093) − 6 • 21093 − 7 + d d = 0, 2, 6, 8 Tony Forbes 16 Sep 1998
5 1034 31969211688 • 2399# + 16061 + d d = 0, 2, 6, 8, 12 Norman Luhn 30 Jul 2002
5 1107 424232794973 • 2593# + 43777 + d d = 0, 4, 6, 10, 12 Norman Luhn 24 Mar 2009
6 1037 28993093368077 • 2399# + 19417 + d d = 0, 4, 6, 10, 12, 16 Norman Luhn 14 Mar 2016
7 1002 113225039190926127209 • 2339# / 57057 + 1 + d d = 0, 2, 6, 8, 12, 18, 20 Peter Kaiser 27 Jan 2021
7 Not yet found ! d = 0, 2, 8, 12, 14, 18, 20

k Digits Early discovery with at least 2,000 digits to given pattern Who When
1 2917 29689 − 1 Donald Bruce Gillies 11 May 1963
2 2003 260497545 • 26625 ± 1 Arthur Oliver Lonsdale Atkin Dec 1984
3 2129 205702716 • 4973# / 35 − 1 + d d = 0, 2, 6 Rosenthal, Jobling 17 Dec 2000
3 2049 102048 + 418590204063 + d d = 0, 4, 6 Norman Luhn 11 Jan 2001
4 2058 4104082046 • 4799# + 5651 + d d = 0, 2, 6, 8 Norman Luhn 29 Apr 2005
5 2002 126831252923413 • 4657# / 273 + 1 + d d = 0, 2, 6, 8, 12 Peter Kaiser 8 Nov 2020
5 2034 566761969187 • 4733# / 2 − 8 + d d = 0, 4, 6, 10, 12 Serge Batalov 7 Dec 2020

k Digits Early discovery with at least 3,000 digits to given pattern Who When
1 3376 211213 − 1 Donald Bruce Gillies 2 Jun 1963
2 3389 1706595 • 211235 ± 1      John Brown, Landon Curt Noll, Bruce K. Parady, Gene Ward Smith, Joel F. Smith, Sergio E. Zarantonello The Amdahl 6 7 Jun 1989
3 3153 813529138 • 1939938500 − 1 + d d = 0, 2, 6 Norman Luhn 13 Jul 2002
3 4134 (18599651274 • 4436 • 3251# • (4436 • 3251# + 1) + 210) • (4436 • 3251# − 1) / 35 + 7 + d d = 0, 4, 6 David Broadhurst 28 Sep 2002
4 3024 43697976428649 • 29999 − 1 + d d = 0, 2, 6, 8 Peter Kaiser 26 Mar 2012
5 3344 585150568069684836 • 7757# / 85085 + 5 + d d = 0, 2, 6, 8, 12 Peter Kaiser 06 Mar 2022
5 Not yet found ! d = 0, 4, 6, 10, 12

k Digits Early discovery with at least 4,000 digits to given pattern Who When
1 6002 219937 − 1 Bryant Tuckerman 4 Mar 1971
2 4030 1692923232 • 104020 ± 1 Harvey Dubner Jul 1993
3 4019 (61504372896 • 5119 • 3163# • (5119 • 3163# + 1) + 210) • (5119 • 3163# − 1) / 35 + 5 + d d = 0, 2, 6 David Broadhurst 10 Aug 2002
3 4134 (18599651274 • 4436 • 3251# • (4436 • 3251# + 1) + 210) • (4436 • 3251# − 1) / 35 + 7 + d d = 0, 4, 6 David Broadhurst 28 Sep 2002
4 5003 4122429552750669 • 216567 − 1 + d d = 0, 2, 6, 8 Peter Kaiser 10 Mar 2016

k Digits Early discovery with at least 5,000 digits to given pattern Who When
1 6002 219937 − 1 Bryant Tuckerman 4 Mar 1971
2 5129 570918348 • 105120 ± 1 Harvey Dubner Oct 1995
3 5132 (91456744909 • 205881 • 4001# • (205881 • 4001# + 1) + 210) • (205881 • 4001# − 1) / 35 + 5 + d d = 0, 2, 6 Ken Davis 4 May 2006
3 5132 (63095588824 • 205881 • 4001# • (205881 • 4001# + 1) + 210) • (205881 • 4001# − 1) / 35 + 7 + d d = 0, 4, 6 Ken Davis 7 Oct 2005
4 5003 4122429552750669 • 216567 − 1 + d d = 0, 2, 6, 8 Peter Kaiser 10 Mar 2016

k Digits Early discovery with at least 6,000 digits to given pattern Who When
1 6002 219937 − 1 Bryant Tuckerman 4 Mar 1971
2 11713 242206083 • 238880 ± 1 Karl-Heinz Indlekofer, Antal Járai Nov 1995
3 6223 5612052289 • 14489# / 5 − 1 + d d = 0, 2, 6 Norman Luhn 3 Jan 2008
3 16737 6521953289619 • 255555 − 5 + d d = 0, 4, 6 Peter Kaiser 30 Apr 2013
4 10132 667674063382677 • 233608 − 1 + d d = 0, 2, 6, 8 Peter Kaiser 27 Feb 2019

k Digits Early discovery with at least 7,000 ... 9,000 digits to given pattern Who When
1 13395 244497 − 1 Harry Lewis Nelson, David Slowinski 8 Apr 1979
2 11713 242206083 • 238880 ± 1 Karl-Heinz Indlekofer, Antal Járai Nov 1995
3 10047 2072644824759 • 233333 − 1 + d d = 0, 2, 6 Norman Luhn, François Morain 17 Nov 2008
3 16737 6521953289619 • 255555 − 5 + d d = 0, 4, 6 Peter Kaiser 30 Apr 2013
4 10132 667674063382677 • 233608 − 1 + d d = 0, 2, 6, 8 Peter Kaiser 27 Feb 2019