Riesel primes of the form 2181•2n-1

Current data

k , b : 2181 , 2 Type : 3 Count : 28 Nash : 1785 Max n : 1,025,000 Date : 2013-08-28

29, 33, 47, 131, 213, 263, 609, 753, 869, 1019, 3651, 3791, 8349, 8415, 9423, 9771, 11051, 14415, 17325, 21959, 37890, 47093, 151853, 264233, 319607, 614309, 727935, 750875

History

• 2023-03-14: Checked n = 1 - 666666, Alexander Jones, double check
• 2015-05-18: Checked n = 600000 - 700000, Karsten Bonath
• 2013-08-28: Checked n = 666666 - 1025000, RPS Drive 11, released
• 2012-02-18: Checked n = 350000 - 425000, NPLB Drive 12C, released
• 2012-01-03: Checked n = 250000 - 350000, NPLB Drive 12B, released
• 2011-12-31: Reserved by NPLB Drive 12C, for 350001 ≤ n ≤ 425000
• 2011-10-25: Found n = 750875, Peter Benson, RPS Drive 11
• 2011-09-23: Found n = 727935, Peter Benson, RPS Drive 11
• 2011-09-03: Reserved by RPS Drive 11 from n=666666
• 2010-11-19: Checked n = 425000 - 600000, NPLB Drive 11, released
• 2010-03-26: Reserved by NPLB Drive 12B, for 250001 ≤ n ≤ 350000
• 2010-01-05: Checked n = 50000 - 250000, NPLB Drive 12A, released
• 2009-12-18: Checked n = 20000 - 50000, Karsten Bonath
• 2009-08-14: 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
• 2008-01-19: Found n = 37890, Jean Penné, CRUS Liskovets-Gallot