Riesel primes of the form 2211•2n-1

Current data

k , b : 2211 , 2 Type : 3 Count : 89 Nash : 4509 Max n : 1,310,000 Date : 2015-05-18

1, 7, 13, 15, 19, 21, 39, 43, 49, 54, 85, 94, 149, 159, 166, 217, 291, 314, 331, 371, 415, 489, 501, 682, 725, 770, 853, 921, 1261, 1273, 1330, 1431, 1638, 1750, 2030, 2119, 2490, 2499, 2751, 2959, 3397, 3981, 4086, 5385, 5598, 5854, 5881, 6183, 6833, 7009, 7097, 8538, 14355, 16399, 24173, 26617, 26831, 27057, 30179, 32547, 33505, 34162, 35719, 40807, 62661, 77403, 103241, 151689, 171322, 171747, 188221, 203370, 204241, 229662, 234539, 267747, 268226, 349073, 351181, 373102, 477294, 905791, 998593, 1111659, 1142207, 1149075, 1162499, 1255185, 1268154

History

• 2015-05-18: Checked n = 600000-700000, Karsten Bonath
• 2015-04-20: Checked to n = 1310000, RPS Drive 12
• 2015-03-08: Found n = 1268154, Thomas Ritschel, RPS Drive 12
• 2015-02-26: Found n = 1255185, Thomas Ritschel, RPS Drive 12
• 2013-09-23: Found n = 1142207, Predrag Kurtovic, RPS Drive 12
• 2013-09-13: Found n = 1162499, Lennart Vogel, RPS Drive 12
• 2013-09-12: Found n = 1149075, Predrag Kurtovic, RPS Drive 12
• 2013-09-09: Found n = 1111659, James P. Burt, RPS Drive 12
• 2013-08-30: Checked to n = 1025000, RPS Drive 11, released
• 2013-08-28: Reserved by RPS Drive 12, n ≥ 1025000
• 2012-07-28: Found n = 998593, Peter Benson, RPS Drive 11
• 2012-04-01: Found n = 905791, 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
• 2011-09-03: Reserved by RPS Drive 11, for n ≥ 666666
• 2010-11-19: Checked to n = 600000, NPLB Drive 11, released
• 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
• 2009-08-30: 477294 confirmed, Gary Barnes
• 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
• 2008-03-13: Found n = 477294, David Metcalfe
• 2006-12-02: Found n = 373102, David Metcalfe
• 2006-08-27: Found n = 351181, David Metcalfe
• 2006-08-25: Found n = 349073, David Metcalfe
• 2006-06-07: Found n = 268226, David Metcalfe
• 2006-06-06: Found n = 267747, David Metcalfe