Riesel primes of the form 9615•2n-1

Current data

k , b : 9615 , 2 Type : 315 Count : 48 Nash : 2435 Max n : 1,000,000 Date : 2025-08-01

2, 3, 8, 14, 15, 17, 38, 62, 71, 83, 156, 179, 348, 551, 911, 1295, 1587, 2855, 3251, 5099, 7572, 9555, 9984, 17585, 22013, 24971, 25928, 29079, 37667, 50568, 70733, 79014, 110838, 118148, 133712, 173523, 185924, 222311, 263832, 281892, 284676, 336473, 481062, 500034, 527772, 537551, 639317, 991347

History

• 2025-08-01: Checked n = 100000 - 1000000, Carlos Eduardo Pinho, double-check n = 400000 - 433000, released
• 2025-08-01: Checked n = 10000 - 100000, Gary Barnes, double-check n = 10000 - 20000, released
• 2009-10-21: Found n = 639317, Ian M. Gunn
• 2009-07-09: Found n = 537551, Ian M. Gunn
• 2009-06-28: Found n = 527772, Ian M. Gunn
• 2009-06-16: Found n = 991347, Ian M. Gunn
• 2009-05-24: Found n = 500034, Ian M. Gunn
• 2009-05-13: Found n = 481062, Ian M. Gunn
• 2009-04-10: Checked n = 400000 - 433000, Ian M. Gunn
• 2009-02-19: Reserved by Ian M. Gunn to n = 1000000
• 2009-01-13: Checked n = 10000 - 20000, Karsten Bonath
• 2007-07-06: Checked n = 1 - 10000, Gary Barnes