Riesel primes of the form 501•2n-1

Reserved! This sequence is currently part of Multi Reservation 8: NPLB Drive 17.

Current data

k , b : 501 , 2 Type : 3 Count : 25 Nash : 2005 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 3, 6, 14, 194, 195, 329, 579, 1386, 1467, 5922, 13178, 19538, 21426, 21689, 23649, 33710, 62262, 85218, 136682, 147062, 371430, 869927, 1428194, 2067915

History

• 2022-09-19: Found n = 2067915, Bruce Marler
• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2015-10-20: Found n = 1428194, Dmitry Domanov
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-08-17: Found n = 869927, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-03-05: Found n = 371430, Timothy Sorbera
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2001-12-14: Found n = 85218, Kimmo Herranen