Riesel primes of the form 991•2n-1

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

Current data

k , b : 991 , {{{Rb}}} Count : 22 Nash : 1185 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 11, 47, 101, 107, 177, 269, 333, 821, 917, 1619, 2801, 7821, 13773, 16083, 23157, 51717, 217065, 219107, 220497, 290981, 519993

[[Category:Riesel {{{Rb}}}|#.....00991]]

History

• 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
• 2008-08-18: Found n = 519993, 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
• 2004-10-10: Found n = 220497, Peter Benson
• 2004-10-10: Found n = 219107, Peter Benson
• 2004-10-10: Found n = 217065, Peter Benson