Riesel primes of the form 2271•2n-1

Current data

k , b : 2271 , 2 Type : 3 Count : 63 Nash : 3180 Max n : 1,310,000 Date : 2015-05-18

5, 9, 11, 13, 14, 21, 29, 38, 45, 59, 98, 125, 149, 223, 233, 305, 423, 530, 549, 571, 599, 814, 935, 1109, 1483, 1969, 2145, 2261, 2718, 2921, 3170, 6633, 13063, 16063, 17973, 20119, 20353, 20779, 41198, 43938, 45963, 51133, 51631, 53450, 83731, 83970, 91465, 124799, 142223, 166950, 188818, 202845, 205394, 338421, 374405, 571385, 580885, 591799, 795514, 833261, 994134, 1019870, 1038481

History

• 2015-05-18: Checked n = 600000-700000, Karsten Bonath
• 2015-04-20: Checked to n = 1310000, RPS Drive 12
• 2013-08-30: Checked to n = 1025000, RPS Drive 11, released
• 2013-08-29: Found n = 1038481, Lennart Vogel, RPS Drive 12
• 2013-08-28: Reserved by RPS Drive 12, n ≥ 1025000
• 2013-08-26: Found n = 1019870, Lennart Vogel, RPS Drive 11
• 2012-07-21: Found n = 994134, Peter Benson, RPS Drive 11
• 2012-02-18: Checked to n = 425000, NPLB Drive 12C, released
• 2012-01-03: Checked to n = 350000, NPLB Drive 12B, released
• 2011-12-31: Reserved by NPLB Drive 12C, for 350001 ≤ n ≤ 425000
• 2011-12-19: Found n = 833261, Peter Benson, RPS Drive 11
• 2011-11-22: Found n = 795514, David Metcalfe, RPS Drive 11
• 2011-09-03: Reserved by RPS Drive 11, for n ≥ 666666
• 2010-11-19: Checked to n = 600000, NPLB Drive 11, released
• 2010-10-04: Found n = 591799, Gary Barnes, NPLB Drive 11
• 2010-08-05: Found n = 580885, Gary Barnes, NPLB Drive 11
• 2010-07-03: Found n = 571385, Gary Barnes, NPLB Drive 11
• 2010-03-26: Reserved by NPLB Drive 12B, for 250001 ≤ n ≤ 350000
• 2010-01-05: Checked to n = 250000, NPLB Drive 12A, released
• 2009-12-18: Checked n = 20000-50000, Karsten Bonath
• 2009-08-13: Reserved by NPLB Drive 12A, for 50001 ≤ n ≤ 250000
• 2009-06-28: Checked n = 10000-20000, Thomas Ritschel
• 2009-06-22: Reserved by NPLB Drive 11, for 425001 ≤ n ≤ 600000