Riesel primes of the form 2187•2n-1

Current data

k , b : 2187 , 2 Type : 3 Count : 53 Nash : 2907 Max n : 1,000,000 Date : 2024-07-16

1, 2, 6, 13, 22, 29, 30, 33, 36, 50, 61, 118, 180, 226, 405, 433, 522, 789, 929, 960, 1026, 1030, 1118, 1266, 1521, 1718, 2536, 3029, 3366, 4253, 9157, 10165, 23641, 29877, 30648, 47265, 56097, 90501, 101981, 103021, 108370, 117909, 157237, 169156, 174168, 196185, 296182, 317977, 323332, 366881, 449776, 916686, 992632

History

• 2024-07-16: Checked to n = 1000000, Gary Barnes, double-check n≤700000, released
• 2015-05-18: Checked n = 600000 - 700000, Karsten Bonath
• 2012-02-18: Checked to n = 425000, NPLB Drive 12C, released
• 2012-01-03: Checked to n = 350000, NPLB Drive 12B, released
• 2011-12-31: Reserved by NPLB Drive 12C, for 350001 ≤ n ≤ 425000
• 2010-11-19: Checked to n = 600000, NPLB Drive 11, released
• 2010-08-23: Found n = 992632, Lei Zhou
• 2010-04-23: Found n = 916686, Lei Zhou
• 2010-03-26: Reserved by NPLB Drive 12B, for 250001 ≤ n ≤ 350000
• 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
• 2009-07-19: 449776 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
• 2009-05-31: Found n = 449776, Lei Zhou
• 2004-10-28: Found n = 174168, David Underbakke