Riesel primes of the form 2253•2n-1

Current data

k , b : 2253 , 2 Type : 3 Count : 80 Nash : 3507 Max n : 1,310,000 Date : 2015-05-18

2, 7, 12, 18, 20, 30, 38, 100, 112, 123, 126, 171, 176, 210, 212, 215, 220, 236, 239, 655, 666, 820, 842, 1206, 1459, 1496, 1819, 1871, 2131, 2463, 2967, 3320, 4142, 5052, 5351, 5682, 6112, 6156, 6179, 6451, 7831, 8703, 9607, 9915, 13703, 15415, 17576, 19740, 19972, 20683, 25308, 26336, 39055, 44243, 47342, 49356, 61118, 70506, 76023, 79211, 84360, 97463, 115478, 174456, 176328, 176791, 181026, 344163, 350247, 414230, 420395, 498443, 595243, 707742, 761112, 777752, 783172, 783422, 812755, 817730

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
• 2013-08-28: 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
• 2011-12-09: Found n = 817730, David Metcalfe, RPS Drive 11
• 2011-12-07: Found n = 812755, Peter Benson, RPS Drive 11
• 2011-12-04: Found n = 783422, Even Stokkedalen, RPS Drive 11
• 2011-11-22: Found n = 783172, Even Stokkedalen, RPS Drive 11
• 2011-11-12: Found n = 777752, David Metcalfe, RPS Drive 11
• 2011-11-01: Found n = 761112, Peter Benson, RPS Drive 11
• 2011-09-10: Found n = 707742, Thomas Ritschel, 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
• 2010-10-18: Found n = 595243, 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
• 2009-10-22: Found n = 498443, Dhumil Zaveri, NPLB Drive 11
• 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