Riesel primes of the form 581•2n-1

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

Current data

k , b : 581 , 2 Count : 22 Nash : 1127 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

18, 22, 26, 30, 62, 130, 322, 678, 790, 886, 7190, 31222, 39306, 62626, 82522, 89010, 138050, 368938, 412030, 513506, 1035962, 1646418

History

• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2021-11-13: Found n = 1646418, Göran Schmidt
• 2011-09-07: Found n = 1035962, Chris Chatfield
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-08-01: Found n = 513506, Gary Barnes
• 2008-04-02: Found n = 412030, Karsten Bonath
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-03-01: Found n = 368938, James P. Burt
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2003-07-16: Found n = 138050, Dennis Okon