Riesel primes of the form 23805•2n-1

Current data

k , b : 23805 , 2 Type : 315 Count : 95 Nash : 4694 Max n : 1,000,000 Date : 2021-07-20

1, 2, 4, 9, 13, 25, 27, 28, 31, 36, 57, 58, 65, 72, 74, 123, 135, 151, 161, 162, 184, 196, 241, 271, 354, 357, 576, 724, 747, 765, 849, 871, 949, 1028, 1033, 1165, 1177, 1388, 1576, 1737, 2193, 2517, 2842, 3109, 3497, 3748, 3858, 4841, 5209, 5324, 5773, 7678, 8953, 10257, 10867, 11331, 14968, 15607, 16921, 18195, 24305, 25252, 30219, 30622, 36336, 37722, 39223, 44779, 48656, 55785, 57097, 62863, 70934, 80482, 84943, 106791, 113775, 118994, 119496, 126457, 126653, 131762, 135568, 270312, 342577, 365993, 384501, 451349, 500218, 521958, 527683, 565351, 572827, 620974, 916969

History

• 2021-07-20: Checked to n = 400000, Alexander Jones, released
• 2021-06-01: Checked to n = 375000, Alexander Jones
• 2021-01-13: Checked to n = 350000, Alexander Jones
• 2020-10-01: Checked to n = 325000, Alexander Jones
• 2020-06-17: Checked to n = 300000, Alexander Jones
• 2020-03-17: Reserved by Alexander Jones for n ≤ 400,000
• 2018-06-23: Checked n = 400000  -  1000000, RPS Drive 9, released
• 2011-11-23: Checked to n = 1007, Gary Barnes
• 2011-02-20: Found n = 916969, Peter Benson, RPS Drive 9
• 2010-03-09: Found n = 620974, David Metcalfe, RPS Drive 9
• 2009-11-28: Found n = 572827, Predrag Minovic, RPS Drive 9
• 2009-11-07: Found n = 565351, Predrag Minovic, RPS Drive 9
• 2009-08-13: Found n = 527683, David Metcalfe, RPS Drive 9
• 2009-07-31: Found n = 521958, Thomas Ritschel, RPS Drive 9
• 2009-07-08: Found n = 500218, David Metcalfe, RPS Drive 9
• 2009-05-27: Found n = 451349, Predrag Minovic, RPS Drive 9
• 2009-05-12: Reserved by RPS Drive 9 for n > 400000
• 2008-07-23: Checked to n = 100000, David Harrison