Riesel primes of the form 641•2n-1

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

Current data

k , b : 641 , {{{Rb}}} Count : 14 Nash : 905 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

6, 14, 38, 78, 186, 2006, 2594, 17018, 17714, 20018, 118254, 148290, 496430, 1018986

[[Category:Riesel {{{Rb}}}|#.....00641]][[Category:Riesel {{{Rb}}} Low-weight|#.....00641]]

History

• 2012-02-23: Found n = 1018986, Lennart Vogel
• 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
• 2008-07-07: Found n = 496430, 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
• 2003-04-11: Found n = 118254, Steven Harvey