Riesel primes of the form 23•2n-1

Current data

k , b : 23 , 2 Count : 17 Nash : 1332 Max n : 5,000,000 Date : 2024-08-07

4, 6, 12, 46, 72, 244, 264, 544, 888, 1146, 14826, 24978, 103386, 323668, 458362, 496422, 2141626

History

• 2024-08-07: Reservation dropped, Paul Underwood
• 2021-10-18: Reserved by Paul Underwood
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2013-05-29: Checked to n = 5000000, Peter Benson
• 2012-12-18: Checked to n = 4000000, Peter Benson
• 2012-10-22: Checked to n = 3000000, Peter Benson
• 2012-10-09: none, Mark Anderson, released
• 2012-10-03: Reserved by Peter Benson from n=1500000
• 2009-01-10: Checked to n = 2000000?, Mark Anderson
• 2009-01-09: Checked n = 950000 - 1028327, 1140048 - 1176744, 1430124 - 1454782, 1455156 - 1462704, 1652068 - 1743598, 1967608 - 2027596, Peter Benson
• 2008-04-20: Found n = 2141626, Mark Anderson
• 2008-01-05: Checked to n = 1500000, Mark Anderson
• 2004-11-30: Checked to n = 1000000, Mark Anderson
• 2004-08-09: Found n = 496422, Mark Anderson
• 2004-05-20: Found n = 458362, Mark Anderson
• 2004-04-08: Found n = 323668, Mark Anderson
• 2004-04-01: Checked to n = 200000?, Mark Anderson
• 2004-04-01: Reserved by Mark Anderson
• 1998-07-28: Found n = 24978, Wilfrid Keller