Riesel primes of the form 825•2n-1

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

Current data

k , b : 825 , 2 Type : 315 Count : 88 Nash : 4346 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 3, 5, 8, 18, 20, 23, 24, 30, 35, 36, 37, 45, 52, 54, 59, 62, 64, 68, 80, 82, 84, 90, 111, 191, 218, 228, 275, 325, 456, 502, 722, 797, 827, 1175, 1245, 1250, 1532, 1844, 2807, 3352, 3549, 3946, 3990, 4456, 5147, 5171, 5786, 7246, 7443, 9022, 9030, 9536, 12503, 12732, 13688, 15723, 18586, 20246, 20421, 20511, 24176, 32725, 42894, 55085, 71029, 93875, 107590, 137754, 155882, 177120, 257168, 259541, 273336, 280818, 311499, 392581, 443120, 552348, 563255, 665464, 928684, 987356, 999698, 1117738, 1191114, 1402592, 1504415

History

• 2018-04-04: Found n = 1504415, Gary Barnes
• 2015-07-16: Found n = 1402592, Max Dettweiler
• 2012-06-08: Found n = 1191114, Brian Lody
• 2012-04-15: Found n = 1117738, Brian Lody
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2011-07-05: Found n = 999698, Lennart Vogel
• 2011-06-21: Found n = 987356, Lennart Vogel
• 2011-04-13: Found n = 928684, Vaughan Davies
• 2009-04-09: 665464 confirmed, Ian M. Gunn
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
• 2008-12-01: Found n = 563255, Gary Barnes
• 2008-11-18: Found n = 552348, Gary Barnes
• 2008-06-22: Found n = 665464, David Metcalfe
• 2008-05-24: Found n = 443120, Chris Chatfield
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-11: Found n = 392581, Carlos Eduardo Pinho
• 2008-03-05: Found n = 392581, 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
• 2005-04-20: Found n = 259541, Larry Soule
• 2005-04-19: Found n = 257168, Larry Soule
• 2004-10-25: Found n = 177120, Steven Harvey
• 2002-11-07: Found n = 107590, Steven Harvey
• 2002-04-18: Found n = 93875, Andrew J. Rupinski
• 2001-01-26: Found n = 71029, Dale Andrews