Riesel primes of the form 2715•2n-1

Current data

k , b : 2715 , 2 Type : 315 Count : 45 Nash : 3018 Max n : 2,000,000 Date : 2024-04-14

2, 7, 13, 15, 30, 31, 38, 81, 142, 150, 230, 310, 371, 459, 492, 822, 2515, 3837, 4341, 6102, 6850, 9122, 9590, 10426, 12966, 16782, 21035, 34998, 44566, 51538, 51990, 121246, 132732, 190363, 250091, 268882, 525530, 578940, 701687, 722131, 1163216, 1404211, 1429628, 1629931, 1640137

History

• 2024-04-14: Checked to n = 2000000, RPS Drive 7, released
• 2017-12-30: Found n = 1640137, Thomas Ritschel, RPS Drive 7
• 2017-12-30: Found n = 1629931, Thomas Ritschel, RPS Drive 7
• 2014-04-13: Found n = 1429628, David Metcalfe, RPS Drive 7
• 2014-04-01: Found n = 1404211, David Metcalfe, RPS Drive 7
• 2013-03-22: Found n = 1163216, 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
• 2011-12-11: 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
• 2010-07-29: 578940 confirmed, Gary Barnes, NPLB Drive 11
• 2010-01-22: 525530 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
• 2009-12-14: Found n = 722131, Michael Curtis, RPS Drive 7
• 2009-12-03: Found n = 701687, Peter Benson, RPS Drive 7
• 2009-08-22: Reserved to n = 1000000, RPS Drive 7
• 2009-08-13: Reserved by NPLB Drive 12A, for 50001 ≤ n ≤ 250000
• 2009-06-28: Checked n = 10000 - 20000, Thomas Ritschel
• 2009-06-22: Found n = 578940, Thomas Ritschel, RPS Drive 7
• 2009-06-22: Reserved by NPLB Drive 11, for 425001 ≤ n ≤ 600000
• 2009-04-12: Found n = 525530, David Metcalfe, RPS Drive 7
• 2009-02-06: Reserved by RPS Drive 7, for 360000 ≤ n ≤ 600000