Riesel primes of the form 7215•2n-1

Current data

k , b : 7215 , 2 Type : 315 Count : 81 Nash : 4367 Max n : 1,333,000 Date : 2025-05-05

2, 3, 12, 14, 16, 23, 32, 33, 34, 44, 46, 72, 77, 87, 91, 174, 178, 179, 284, 328, 333, 442, 574, 578, 581, 589, 611, 616, 692, 768, 896, 1031, 1098, 1553, 2604, 2618, 3357, 3423, 3936, 4414, 6424, 8871, 10454, 11518, 13337, 22027, 22628, 24354, 33453, 33918, 39108, 39479, 40262, 44959, 48641, 50094, 51842, 60539, 86364, 93417, 95007, 103697, 113778, 140424, 146861, 176024, 197964, 201474, 213356, 240198, 251767, 462798, 521696, 527378, 608122, 637323, 649002, 731016, 911807, 1114007, 1285443

History

• 2025-05-05: Checked n = 10000 - 380000, Gary Barnes, double-check n = 10000 - 50000, released
• 2024-04-10: Checked n = 380000 - 1333000, RPS Drive 8, released
• 2015-03-21: Found n = 1285443, James P. Burt, RPS Drive 8
• 2013-08-25: Found n = 1114007, James P. Burt, RPS Drive 8
• 2011-02-22: Found n = 911807, Peter Benson, RPS Drive 8
• 2010-08-23: Found n = 731016, Peter Benson, RPS Drive 8
• 2009-10-10: Found n = 649002, Peter Benson, RPS Drive 8
• 2009-09-26: Found n = 637323, Peter Benson, RPS Drive 8
• 2009-08-13: Found n = 608122, Peter Benson, RPS Drive 8
• 2009-05-27: Found n = 527378, Thomas Ritschel, RPS Drive 8
• 2009-05-24: Found n = 521696, David Metcalfe, RPS Drive 8
• 2009-04-20: Found n = 462798, Thomas Ritschel, RPS Drive 8
• 2009-03-24: Reserved by RPS Drive 8, for n = 380000 - 700000
• 2009-12-27: Checked n = 10000 - 50000, Peter Benson
• 2007-07-06: Checked n = 1 - 10000, Gary Barnes
• 1999-08-18: Found n = 33453, Stephen Scott