Riesel primes of the form 797•2n-1

Reserved! This sequence is currently part of Multi Reservation 3: NPLB Drive 18.

Current data

k , b : 797 , 2 Count : 46 Nash : 2137 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 18, 20, 28, 38, 42, 60, 68, 108, 132, 140, 172, 212, 648, 954, 1112, 1142, 1178, 1808, 1910, 1982, 1988, 2142, 2312, 3074, 3268, 3812, 4672, 6458, 14108, 18340, 20860, 25398, 39122, 54028, 54060, 58108, 71690, 90050, 116438, 267608, 398900, 492100, 644220, 722812, 732318

History

• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2009-11-20: Found n = 732318, Gary Barnes
• 2009-10-24: Found n = 722812, Karsten Bonath
• 2009-05-01: Found n = 644220, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-06-24: Found n = 492100, James P. Burt
• 2008-03-30: Found n = 398900, Gary Barnes
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2003-04-26: Found n = 116438, Kimmo Herranen