Riesel primes of the form 2061•2n-1

Current data

k , b : 2061 , 2 Type : 3 Count : 62 Nash : 3124 Max n : 1,310,000 Date : 2015-05-18

2, 3, 5, 9, 11, 15, 17, 19, 21, 31, 35, 42, 75, 81, 101, 113, 117, 123, 130, 137, 215, 249, 291, 453, 465, 713, 1423, 1851, 1930, 2313, 2489, 2663, 2945, 4221, 4809, 5501, 5979, 9835, 12531, 17567, 18075, 22047, 23775, 27527, 40971, 41223, 97050, 110181, 113250, 121151, 191419, 237293, 246151, 267737, 299691, 357711, 398745, 956891, 1087375, 1156802, 1216253, 1247471

History

• 2015-05-18: Checked n = 600000 - 700000, Karsten Bonath
• 2015-04-20: Checked to n = 1310000, RPS Drive 12
• 2015-02-24: Found n = 1247471, Thomas Ritschel, RPS Drive 12
• 2013-09-17: Found n = 1216253, Lennart Vogel, RPS Drive 12
• 2013-09-12: Found n = 1156802, Lennart Vogel, RPS Drive 12
• 2013-09-05: Found n = 1087375, 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
• 2012-06-12: Found n = 956891, Larry Soule, 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
• 2009-08-13: 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
• 2006-05-12: Found n = 237293, Peter Benson