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k	Digits	Early discovery with at least 10,000 digits	Who	When
1	13395	244497 − 1	Harry Lewis Nelson & David Slowinski	8 Apr 1979
2	11713	242206083 • 238880 ± 1	H. K. Indlekofer & A. Járai	Nov 1995
3	10047	2072644824759 • 233333 − 1 + d, d = 0, 2, 6	Norman Luhn & François Morain	Nov 2008
4	10132	667674063382677 • 233608 − 1 + d, d = 0, 2, 6, 8	Peter Kaiser	27 Feb 2019

k	Digits	Early discovery with at least 20,000 digits	Who	When
1	25962	286243 − 1	David Slowinski	25 Sep 1982
2	20008	1693965 • 266443 ± 1	Giovanni La Barbera, Paul Jobling, Yves Gallot	Oct 2000
3	20008	4111286921397 • 266420 − 1 + d, d = 0, 2, 6	Peter Kaiser	24 Apr 2019

k	Digits	Early discovery with at least 30,000 digits	Who	When
1	65050	2216091 − 1	David Slowinski	1 Sep 1985
2	32220	318032361 • 2107001 ± 1	Underbakke & Carmody	2001

k	Digits	Early discovery with at least 40,000 / 50,000 digits	Who	When
1	65050	2216091 − 1	David Slowinski	1 Sep 1985
2	51090	33218925 • 2169690 ± 1	Daniel Papp	Sep 2002

k	Digits	Early discovery with at least 60,000 digits	Who	When
1	65050	2216091 − 1	David Slowinski	1 Sep 1985
2	100355	65516468355 • 2333333 ± 1	Peter Kaiser, PrimeGrid	15 Aug 2009

k	Digits	Early discovery with at least 70,000 ... 90,000 digits	Who	When
1	227832	2756839 − 1	David Slowinski & Paul Gage	19 Feb 1992
2	100355	65516468355 • 2333333 ± 1	Peter Kaiser, PrimeGrid	15 Aug 2009