Riesel primes of the form 651•2n-1

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

Current data

k , b : 651 , 2 Type : 3 Count : 47 Nash : 2836 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 13, 14, 25, 26, 34, 71, 118, 127, 133, 151, 161, 195, 250, 354, 471, 481, 498, 933, 1710, 1727, 2814, 3450, 6365, 6570, 16042, 17453, 19181, 21922, 24025, 26441, 34442, 50794, 58954, 93618, 173950, 239810, 391698, 412715, 674785, 720318, 893622, 919214, 1091613, 1166010, 1352397, 1974918

History

• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2023-01-16: Found n = 1974918, Max Dettweiler
• 2014-10-08: Found n = 1352397, Gary Barnes
• 2012-04-28: Found n = 1166010, Brian Lody
• 2012-03-23: Found n = 1091613, Brian Lody
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2011-01-06: Found n = 919214, James P. Burt
• 2011-01-03: Found n = 893622, Ricky L. Hubbard
• 2009-10-18: Found n = 720318, Vaughan Davies
• 2009-05-15: Found n = 674785, David James
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-04-04: Found n = 412715, Chris Chatfield
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-20: Found n = 391698, 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
• 2004-10-31: Found n = 239810, Steven Harvey
• 2004-09-07: Found n = 173950, Steven Harvey
• 2002-02-19: Found n = 93618, Andrew J. Rupinski