Riesel primes of the form 2415•2n-1

Current data

k , b : 2415 , 2 Type : 315 Count : 57 Nash : 2936 Max n : 2,000,000 Date : 2024-04-14

3, 4, 5, 9, 10, 18, 22, 54, 58, 66, 77, 124, 155, 282, 337, 380, 534, 550, 633, 750, 919, 956, 1254, 1363, 2607, 3270, 5370, 6702, 12532, 18669, 21267, 26338, 30913, 34242, 35705, 38276, 39229, 39372, 54982, 56593, 61229, 62532, 74636, 105045, 178260, 229867, 249665, 276906, 289219, 348006, 439954, 722317, 738763, 953278, 1208963, 1413627, 1801615

History

• 2024-04-14: Checked to n = 2000000, RPS Drive 7, released
• 2018-08-03: Found n = 1801615, Thomas Ritschel, RPS Drive 7
• 2014-04-05: Found n = 1413627, David Metcalfe, RPS Drive 7
• 2013-08-13: Found n = 1208963, Predrag Minovic, 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
• 2011-09-13: Reserved to n = 2000000, RPS Drive 7
• 2010-12-20: Reserved by NPLB Drive 12B, for 250001 ≤ n ≤ 350000
• 2010-11-19: Checked to n = 600000, NPLB Drive 11, released
• 2010-06-24: Found n = 953278, Predrag Minovic, RPS Drive 7
• 2010-01-05: Checked to n = 250000, NPLB Drive 12A, released
• 2010-01-04: Found n = 738763, Thomas Ritschel, RPS Drive 7
• 2010-01-04: Found n = 722317, Michael Curtis, RPS Drive 7
• 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
• 2009-07-08: 439954 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
• 2009-02-17: Found n = 439954, James P. Burt, RPS Drive 7
• 2009-02-06: Reserved by RPS Drive 7, for 360000 ≤ n ≤ 600000