Riesel primes of the form 2805•2n-1

Current data

k , b : 2805 , 2 Type : 3152805 Count : 94 Nash : 5078 Max n : 800,000 Date : 2024-06-13

4, 5, 6, 9, 12, 13, 15, 23, 27, 35, 46, 47, 54, 56, 60, 63, 80, 81, 101, 136, 137, 140, 160, 212, 226, 247, 259, 511, 531, 545, 652, 835, 971, 983, 1088, 1098, 1135, 1604, 1666, 1700, 1794, 1882, 1991, 2005, 2432, 2515, 3515, 4477, 6308, 7121, 8276, 8545, 8720, 9213, 9702, 10720, 13236, 13252, 13572, 14501, 15139, 15272, 16151, 16985, 25809, 28162, 28378, 29962, 30140, 44351, 44706, 47319, 52181, 53189, 65360, 66795, 82733, 96708, 109422, 112427, 123916, 124337, 139671, 171485, 196698, 245283, 276468, 278127, 386136, 390941, 464446, 548291, 634905, 699676

History

• 2024-06-13: Checked to n = 800000, Gary Barnes, released
• 2020-12-19: none, Tyler NeSmith, released
• 2020-12-01: Reserved by Tyler NeSmith, for n>600000
• 2012-06-20: Checked n = 250000 - 500000, David Metcalfe, from here
• 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
• 2011-11-19: Found n = 699676, Peter Benson
• 2010-11-19: Checked to n = 600000, NPLB Drive 11, released
• 2010-03-27: Found n = 548291, 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
• 2009-08-13: Reserved by NPLB Drive 12A, for 50001 ≤ n ≤ 250000
• 2009-08-04: 464446 confirmed, Vaughan Davies, NPLB Drive 11
• 2009-06-28: Checked n = 10000 - 20000, Thomas Ritschel
• 2009-06-22: Reserved by NPLB Drive 11, for 425001 ≤ n ≤ 600000
• 2008-02-13: Found n = 464446, David Metcalfe
• 2007-03-20: Found n = 390941, David Metcalfe
• 2007-01-27: Found n = 386136, David Metcalfe
• 2006-06-07: Found n = 278127, David Metcalfe
• 2006-06-05: Found n = 276468, David Metcalfe