Riesel primes of the form 2505•2n-1

Current data

k , b : 2505 , 2 Type : 315 Count : 75 Nash : 3730 Max n : 2,000,000 Date : 2024-04-14

1, 6, 8, 13, 20, 21, 22, 26, 34, 51, 63, 70, 80, 91, 144, 152, 174, 214, 219, 246, 271, 272, 306, 322, 444, 514, 529, 543, 650, 729, 822, 980, 1109, 1271, 1373, 1501, 1602, 1625, 2881, 3008, 3174, 4881, 4995, 5386, 10910, 13094, 15839, 20721, 21585, 29330, 31674, 44201, 48810, 51902, 56189, 70162, 103929, 105293, 121535, 129713, 147972, 154475, 159681, 163440, 172015, 181188, 196099, 288344, 326232, 345204, 468805, 558870, 574175, 979009, 1264470

History

• 2024-04-14: Checked to n = 2000000, RPS Drive 7, released
• 2013-08-22: Found n = 1264470, David Metcalfe, RPS Drive 7
• 2012-02-18: Checked to n = 425000, NPLB Drive 12C, released
• 2012-01-06: Reserved by NPLB Drive 12C, for 350001 ≤ n ≤ 425000
• 2012-01-03: Checked to n = 350000, NPLB Drive 12B, released
• 2011-12-10: Reserved by NPLB Drive 12B, for 250001 ≤ n ≤ 350000
• 2011-09-13: Reserved to n = 2000000, RPS Drive 7
• 2010-11-19: Checked to n = 600000, NPLB Drive 11, released
• 2010-07-27: Found n = 979009, Peter Benson, RPS Drive 7
• 2010-07-12: 574175 confirmed, Gary Barnes, NPLB Drive 11
• 2010-05-14: 558870 confirmed, Gary Barnes, NPLB Drive 11
• 2010-01-05: Checked to n = 250000, NPLB Drive 12A, released
• 2009-12-18: Checked n = 20000 - 50000, Karsten Bonath
• 2009-08-22: Reserved to n = 1000000, RPS Drive 7
• 2009-08-13: Reserved by NPLB Drive 12A, for 50001 ≤ n ≤ 250000
• 2009-08-07: 468805 confirmed, Gary Barnes, NPLB Drive 11
• 2009-06-28: Checked n = 10000 - 20000, Thomas Ritschel
• 2009-06-22: Reserved by NPLB Drive 11, for 425001 ≤ n ≤ 600000
• 2009-06-20: Found n = 574175, Thomas Ritschel, RPS Drive 7
• 2009-05-10: Found n = 558870, David Metcalfe, RPS Drive 7
• 2009-02-22: Found n = 468805, Peter Benson, RPS Drive 7
• 2009-02-06: Reserved by RPS Drive 7, for 360000 ≤ n ≤ 600000