Riesel primes of the form 661•2n-1

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

Current data

k , b : 661 , {{{Rb}}} Count : 14 Nash : 1027 Max n : 2,170,000 Date : 2024-04-02 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 9, 47, 55, 311, 325, 2449, 3829, 15935, 26327, 122031, 129069, 229911, 311207

[[Category:Riesel {{{Rb}}}|#.....00661]]

History

• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 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
• 2004-12-20: Found n = 229911, Steven Harvey
• 2003-08-18: Found n = 129069, Dennis Okon
• 2003-08-18: Found n = 122031, Dennis Okon