Riesel primes of the form 55•2n-1

Reserved! This sequence is currently reserved by: William Byerly

Current data

k , b : 55 , {{{Rb}}} Count : 57 Nash : 2113 Max n : 2,400,000 Date : 2021-02-18 Reserved : William ByerlyWilliam Byerly/Reserved

1, 3, 5, 7, 15, 33, 41, 57, 69, 75, 77, 131, 133, 153, 247, 305, 351, 409, 471, 1251, 1259, 2253, 2411, 2425, 2699, 3221, 4099, 4173, 4291, 4905, 5349, 6723, 7143, 7505, 10539, 10557, 12099, 17373, 23721, 27895, 33801, 35519, 45927, 63589, 73287, 96933, 106659, 218043, 253047, 397941, 651015, 1075711, 1162155, 1406997, 1468439, 1729777, 2084305

[[Category:Riesel {{{Rb}}}|#.....00055]]

History

• 2021-02-18: Checked to n = 2400000, William Byerly
• 2021-02-10: Found n = 2084305, William Byerly
• 2021-02-06: Checked to n = 2200000, William Byerly
• 2017-07-27: Reserved by William Byerly
• 2014-10-05: Checked to n = 2060000, Predrag Minovic, released
• 2013-12-08: Checked to n = 2000000, Predrag Minovic
• 2013-09-08: Checked to n = 1920000, Predrag Minovic
• 2013-07-09: Checked to n = 1830000, Predrag Minovic
• 2013-05-10: Found n = 1729777, Predrag Minovic
• 2013-02-07: Found n = 1468439, Predrag Minovic
• 2012-12-27: Reserved by Predrag Minovic from n=1410000
• 2011-01-13: Checked to n = 1410000, Borys Jaworski, released
• 2011-01-13: Found n = 1406997, Borys Jaworski
• 2011-01-03: Checked to n = 1380000, Borys Jaworski
• 2010-11-30: Checked to n = 1320000, Borys Jaworski
• 2010-11-19: Reserved by Borys Jaworski from n=1300000
• 2008-03-27: Found n = 1162155, Mark Anderson
• 2008-03-21: Found n = 1075711, Mark Anderson
• 2008-02-24: Checked to n = 946000, Chris Chatfield
• 2007-12-09: Checked to n = 929000, Chris Chatfield
• 2007-07-16: Checked to n = 900000, Chris Chatfield
• 2007-07-16: Checked to n = 800000, Chris Chatfield
• 2007-06-05: Found n = 651015, Chris Chatfield
• 2005-02-10: Found n = 397941, Predrag Minovic
• 2004-11-07: Found n = 253047, Predrag Minovic
• 2004-11-04: Found n = 218043, Predrag Minovic
• 1999-06-30: Found n = 96933, Dale Andrews
• 1999-06-08: Found n = 73287, Dale Andrews
• 1999-05-31: Found n = 63589, Dale Andrews
• 1999-05-16: Found n = 45927, Dale Andrews
• 1999-04-14: Found n = 35519, Dale Andrews
• 1999-04-14: Found n = 33801, Dale Andrews
• 1999-04-13: Found n = 27895, Dale Andrews
• 1994: Found n = 7505, Harvey Dubner
• 1994: Found n = 7143, Harvey Dubner
• 1994: Found n = 6723, Harvey Dubner