Riesel primes of the form 2205•2n-1

Current data

k , b : 2205 , 2 Type : 315 Count : 66 Nash : 3532 Max n : 1,310,000 Date : 2015-05-18

1, 2, 4, 7, 11, 14, 19, 25, 31, 37, 39, 40, 44, 80, 91, 110, 122, 150, 181, 222, 281, 349, 425, 651, 714, 805, 1079, 1304, 1387, 1691, 1762, 1774, 2287, 2459, 2657, 3190, 3490, 3784, 6507, 7045, 7407, 8067, 9461, 10254, 12539, 13599, 14900, 16321, 16494, 20410, 20479, 22280, 31460, 34567, 42811, 57230, 91711, 97827, 117001, 123949, 169691, 228697, 234965, 381194, 468111, 1275529

History

• 2015-05-18: Checked n = 600000 - 700000, Karsten Bonath
• 2015-04-20: Checked to n = 1310000, RPS Drive 12
• 2015-03-16: Found n = 1275529, Thomas Ritschel, RPS Drive 12
• 2013-08-30: Checked to n = 1025000, RPS Drive 11, released
• 2013-08-28: Reserved by RPS Drive 12, n ≥ 1025000
• 2012-02-18: 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
• 2010-10-19: 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
• 2009-08-08: Found n = 468111, Vaughan Davies, NPLB Drive 11
• 2009-06-28: Checked n = 10000 - 20000, Thomas Ritschel
• 2009-06-22: Reserved by NPLB Drive 11, for 425001 ≤ n ≤ 600000
• 2005-09-12: Found n = 234965, Chris Chatfield
• 2005-09-11: Found n = 228697, Chris Chatfield
• 1998-12-31: Found n = 34567, Chris Caldwell