Riesel primes of the form 215•2n-1

Current data

k , b : 215 , 2 Count : 44 Nash : 2245 Max n : 4,000,000 Date : 2021-03-21

2, 6, 14, 16, 38, 60, 64, 124, 198, 200, 210, 296, 890, 1486, 1646, 1848, 1906, 2540, 6908, 10430, 10848, 13636, 17858, 18386, 18916, 20802, 23936, 30620, 32858, 34860, 34990, 36978, 54394, 55298, 58822, 88508, 109130, 224036, 331784, 714542, 999170, 2131988, 2751022, 3628962

History

• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-03-04: Checked to n = 4000000, Thomas Ritschel, released
• 2018-12-16: Found n = 3628962, Thomas Ritschel
• 2018-10-02: Found n = 2751022, Thomas Ritschel
• 2018-08-13: Found n = 2131988, Thomas Ritschel
• 2018-06-18: Reserved by Thomas Ritschel, from n=2000000
• 2013-02-15: Checked to n = 2000000, Peter Benson, released
• 2013-02-08: Reserved by Peter Benson from n=1300000
• 2012-05-14: Checked to n = 1300000, James P. Burt, released
• 2011-12-31: Checked to n = 1100000, James P. Burt
• 2011-12-10: Reserved by James P. Burt from n=1000000
• 2009-07-30: Reserved by Borys Jaworski from n=1000000
• 2008-10-22: Checked to n = 1000000, NPLB Drive 4, released
• 2008-10-21: Checked to n = 1000000, Predrag Minovic
• 2008-10-11: Found n = 999170, Predrag Minovic
• 2008-09-20: Found n = 714542, Gary Barnes, NPLB Drive 4
• 2008-09-12: Reserved by Predrag Minovic
• 2008-09-09: Reserved by NPLB Drive 4
• 2006-12-16: Checked to n = 600000, RPS Drive 4, released
• 2006-08-08: Found n = 331784, Thomas Ritschel, RPS Drive 4
• 2006-07-28: Reserved by RPS Drive 4, for n = 250000 - 600000
• 2004?: Checked to n = 250000, Mark Anderson, released
• 2004-08-05: Found n = 224036, Mark Anderson
• 2004-06-04: Reserved by Mark Anderson, for n ≤ 250000
• 1999-06-29: Found n = 109130, Rüdiger K. Eckhard