Riesel primes of the form 609•2n-1

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

Current data

k , b : 609 , 2 Type : 3 Count : 75 Nash : 3596 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 4, 7, 9, 11, 12, 13, 15, 16, 19, 21, 33, 45, 49, 52, 56, 57, 112, 151, 160, 175, 192, 195, 239, 376, 392, 1040, 1052, 1100, 1185, 1432, 1495, 2495, 2527, 2571, 2601, 3411, 4033, 4933, 4980, 5344, 5763, 7329, 7561, 7917, 8476, 11183, 15093, 21769, 29313, 31040, 38123, 55307, 57769, 92004, 119505, 122120, 130427, 133924, 163777, 167553, 180912, 197219, 284200, 492403, 596887, 644181, 683212, 754413, 835576, 845063, 1265279, 1647623, 1961889

History

• 2023-01-14: Found n = 1961889, Max Dettweiler
• 2021-12-18: Found n = 1647623, Gary Barnes, originally found by Max Dettweiler
• 2013-11-05: Found n = 1265279, Gary Barnes
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2010-12-02: Found n = 845063, Brian Lody
• 2010-11-26: Found n = 835576, Brian Lody
• 2010-06-27: Found n = 754413, Gary Barnes
• 2009-05-22: Found n = 683212, David James
• 2009-05-02: Found n = 644181, Vaughan Davies
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-21: Found n = 596887, Gary Barnes
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-06-26: Found n = 492403, James P. Burt
• 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
• 2004-12-10: Found n = 197219, Steven Harvey
• 2004-09-07: Found n = 180912, Steven Harvey
• 2004-02-26: Found n = 167553, Thomas Masser
• 2004-02-25: Found n = 163777, Thomas Masser
• 2003-07-28: Found n = 122120, Steven Harvey
• 2003-04-08: Found n = 119505, Steven Harvey