Riesel primes of the form 897•2n-1

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

Current data

k , b : 897 , 2 Type : 3 Count : 27 Nash : 1546 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

5, 8, 14, 28, 29, 133, 157, 217, 233, 364, 413, 622, 1085, 1196, 1673, 2149, 10052, 10673, 13889, 22126, 59942, 116209, 141380, 227678, 360173, 1363405, 1774913

History

• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2022-07-29: Found n = 1774913, Göran Schmidt
• 2014-10-26: Found n = 1363405, Lennart Vogel
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-02-20: Found n = 360173, 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
• 2005-04-25: Found n = 227678, James S. Griffin
• 2003-05-12: Found n = 116209, Steven Harvey