Riesel primes of the form 2175•2n-1

Reserved! This sequence is currently reserved by: Michael Curtis

Current data

k , b : 2175 , 2 Type : 315 Count : 78 Nash : 3128 Max n : 2,100,000 Date : 2025-02-28 Reserved : Michael CurtisMichael Curtis/Reserved

1, 2, 6, 8, 9, 11, 13, 14, 25, 33, 42, 43, 50, 65, 111, 121, 134, 138, 153, 221, 232, 233, 314, 471, 498, 645, 672, 793, 1002, 1701, 1789, 1898, 2029, 2493, 2573, 3570, 5598, 7753, 8010, 11142, 13409, 14096, 14243, 24201, 31873, 36265, 38550, 38942, 57231, 64065, 74009, 76293, 83741, 84233, 93078, 106442, 107318, 128058, 136985, 159486, 162240, 183243, 224093, 274393, 301200, 420511, 545721, 557361, 929651, 1076289, 1077285, 1176013, 1202773, 1266475, 1430261, 1466621, 1484389, 1512256

History

• 2025-02-28: Checked n = 2000000 - 2100000, Michael Curtis
• 2024-06-24: Checked n = 1560000 - 2000000, Michael Curtis
• 2020-03-13: Checked n = 1330000 - 1560000, Michael Curtis
• 2019-03-31: Found n = 1430261, Michael Curtis
• 2019-03-15: Found n = 1512256, Michael Curtis
• 2019-02-23: Found n = 1484389, Michael Curtis
• 2017-06-20: Checked n = 1270000 - 1330000, Michael Curtis
• 2015-05-18: Checked n = 600000 - 700000, Karsten Bonath
• 2015-04-05: Checked n = 600000 - 1270000, Michael Curtis, Steven Tjung, Kristine Wozny
• 2015-02-26: Found n = 1466621, Michael Curtis
• 2014-11-26: Found n = 1202773, Michael Curtis
• 2013-04-29: Found n = 1266475, Michael Curtis
• 2013-03-27: Found n = 1176013, Michael Curtis
• 2012-02-18: Checked n = 350000 - 425000, NPLB Drive 12C, released
• 2012-01-03: Checked n = 250000 - 350000, NPLB Drive 12B, released
• 2011-12-31: Reserved by NPLB Drive 12C, for n = 350000 - 425000
• 2011-12-28: Found n = 1077285, Michael Curtis
• 2011-12-28: Found n = 1076289, Michael Curtis
• 2011-02-28: Found n = 929651, Michael Curtis
• 2010-11-11: Checked n = 400000 - 600000, Steven Tjung
• 2010-03-26: Reserved by NPLB Drive 12B, for n = 250000 - 350000
• 2010-01-05: Checked n = 50000 - 250000, NPLB Drive 12A, released
• 2009-12-18: Checked n = 20000 - 50000, Karsten Bonath
• 2009-09-25: Found n = 557361, Steven Tjung
• 2009-08-13: Reserved by NPLB Drive 12A, for n = 50000 - 250000
• 2009-07-23: Found n = 545721, Steven Tjung
• 2009-06-28: Checked n = 10000 - 20000, Thomas Ritschel
• 2009-03-16: Found n = 420511, Steven Tjung
• 2008-09-28: Checked n = 360000 - 400000, Steven Tjung
• 2008-02-02: Checked n = 280000 - 360000, Steven Tjung
• 2008-01-11: Checked n = 280000 - 300000, Michael Curtis
• 2008-01-03: Checked n = 240000 - 280000, Michael Curtis
• 2007-12-18: Checked n = 166000 - 240000, Michael Curtis
• 2007-08-07: Checked n = 10000 - 166000, Michael Curtis
• 2007-07-06: Checked n = 1 - 10000, Gary Barnes
• 2007-07-04: Checked to n = 160000, Michael Curtis
• 2007-07-04: Reserved by Michael Curtis