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Record history for k=7

k Primes Type Digits Year Discoverer
7 113225039190926127209 · 2339# / 57057 + 1 + d, d = 0, 2, 6, 8, 12, 18, 20 Tuplet 1002 2021 Peter Kaiser
7 x397 · 317# + 1068701 + 0, 2, 6, 8, 12, 18, 20 Tuplet 527 2019 Vidar Nakling, rieMiner
7 115828580393941 · 1200# + 5132201 + 0,2,6,8,12,18,20 Tuplet 515
2018 Norman Luhn, Primo
7 82466536397303904 ·1171# · 2n - 1, n=0..6 CC, 1st kind 509 2015 Andrey Balyakin
7 25802590081726373888 ·1033# · 2n + 1, n=0..6 CC, 2nd kind 454 2015 Andrey Balyakin
7 3931472185692005387730944 · 857# · 2n - 1, n=0..6 CC, 1st kind 382 2015 Andrey Balyakin
7 14317181455772 · 853# · 2n - 1, n=0..6 CC, 1st kind 368 2014 Serge Batalov, NewPGen, PrimeForm
7 162597166369 · 827# · 2n - 1, n=0..6 CC, 1st kind 357 2010 Dirk Augustin, NewPGen, PrimeForm
7 68841237 · 701# + 2525568581 + 0,2,6,8,12,18,20 Tuplet 301 2009 Jens K. Andersen
7 1178137903623 · 661# · 2n - 1, n=0..6 CC, 1st kind 292 2008 Dirk Augustin, NewPGen, PrimeForm
7 251733155478 · 650# + 1146779 + 0,2,8,12,14,18,20 Tuplet 282 2006 Norman Luhn
7 194688251849 · 601# + x155 + 210n, n=0..6 CPAP 259 2003 Jim Fougeron
7 7127829789350 · 460# + x177 + 210n, n=0..6 CPAP 201 2003 Torbjörn Alm & Jens K. Andersen
7 94552004441 · 410# + 165701 + 0,2,6,8,12,18,20 Tuplet 178 2003 Jens K. Andersen
7 497423806097 · 400# + 380284918609481+ 0,2,6,8,12,18,20 Tuplet 173 2001 Norman Luhn