Riesel primes of the form 861•2n-1

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

Current data

k , b : 861 , 2 Type : 3 Count : 108 Nash : 4793 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 5, 6, 9, 10, 18, 21, 25, 29, 30, 37, 45, 50, 78, 85, 90, 95, 117, 146, 159, 203, 229, 335, 381, 390, 499, 559, 639, 698, 763, 781, 811, 874, 953, 1017, 1150, 1325, 1479, 1679, 1693, 1739, 1886, 2203, 2233, 2309, 2345, 2350, 2357, 3054, 3283, 4230, 4330, 4459, 5151, 5270, 5409, 5633, 6027, 6037, 7435, 8214, 8798, 9470, 12005, 19275, 21830, 24093, 30511, 31663, 34453, 49735, 51237, 59593, 59937, 60545, 62317, 67297, 67561, 68927, 70689, 85705, 106450, 142667, 152519, 164501, 172949, 182571, 201189, 260898, 274634, 278225, 303455, 316774, 390107, 463119, 558945, 560221, 572559, 599041, 630463, 645393, 1089919, 1135486, 1203625, 1666295, 1915741, 2216533, 7895451

History

• 2024-09-26: Found n = 2216533, Göran Schmidt, NPLB Drive 18
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2023-01-02: Found n = 1915741, Max Dettweiler
• 2022-02-14: Found n = 1666295, Timothy Sorbera
• 2021-02-21: Found n = 7895451, Ryan Propper
• 2012-06-23: 1203625 confirmed, Brian Lody
• 2012-04-20: Found n = 1135486, David Nicol
• 2012-03-22: Found n = 1089919, 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
• 2011-04-21: Found n = 1203625, James P. Burt
• 2009-03-01: 645393 confirmed, Ian M. Gunn
• 2009-02-09: 630463 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
• 2008-12-12: 599041 confirmed, (Jokern3000)
• 2008-11-29: 572559 confirmed, Ian M. Gunn
• 2008-11-28: 560221 confirmed, Glenn C. Kaiser
• 2008-11-25: 558945 confirmed, Gary Barnes
• 2008-06-03: 463119 confirmed, 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
• 2006-09-17: Found n = 645393, Peter Benson
• 2006-09-02: Found n = 630463, Peter Benson
• 2006-10-27: Found n = 599041, Peter Benson
• 2006-10-06: Found n = 572559, Peter Benson
• 2006-10-16: Found n = 560221, Peter Benson
• 2006-10-14: Found n = 558945, Peter Benson
• 2006-10-01: Found n = 463119, Peter Benson
• 2006-08-26: Found n = 390107, Peter Benson
• 2006-07-31: Found n = 316774, Peter Benson
• 2006-07-28: Found n = 303455, Peter Benson
• 2006-07-16: Found n = 278225, Peter Benson
• 2006-07-15: Found n = 274634, Peter Benson
• 2006-07-12: Found n = 260898, Peter Benson
• 2003-06-03: Found n = 201189, James S. Griffin
• 2003-05-12: Found n = 182571, James S. Griffin
• 2003-04-14: Found n = 172949, James S. Griffin
• 2003-04-10: Found n = 164501, James S. Griffin
• 2003-03-24: Found n = 152519, James S. Griffin
• 2003-03-24: Found n = 142667, James S. Griffin
• 2002-02-22: Found n = 106450, Kimmo Herranen
• 2002-02-22: Found n = 85705, Kimmo Herranen
• 2000-08-28: Found n = 70689, Dale Andrews
• 2000-08-26: Found n = 68927, Dale Andrews
• 2000-08-25: Found n = 67561, Dale Andrews
• 2000-08-24: Found n = 67297, Dale Andrews
• 2000-08-20: Found n = 62317, Dale Andrews
• 2000-08-19: Found n = 60545, Dale Andrews
• 2000-08-19: Found n = 59937, Dale Andrews
• 2000-08-19: Found n = 59593, Dale Andrews
• 2000-08-14: Found n = 51237, Dale Andrews
• 2000-08-13: Found n = 49735, Dale Andrews