Riesel primes of the form 223•2n-1

Current data

k , b : 223 , 2 Type : Low Count : 12 Nash : 341 Max n : 8,000,000 Date : 2022-04-10

3, 19, 91, 211, 699, 819, 1323, 4635, 38019, 307755, 3264459, 5105835

History

• 2022-04-10: Checked to n = 8000000, Thomas Ritschel, released
• 2020-06-22: Checked to n = 7000000, Thomas Ritschel
• 2019-12-17: Checked to n = 6000000, Thomas Ritschel
• 2019-09-28: Checked n = 3270000 - 5000000, Thomas Ritschel
• 2019-09-28: Found n = 5105835, Thomas Ritschel
• 2012-05-13: Checked to n = 3270000, Borys Jaworski, released
• 2012-05-04: Found n = 3264459, Borys Jaworski
• 2012-04-30: Checked to n = 3260000, Borys Jaworski
• 2012-03-31: Checked to n = 3220000, Borys Jaworski
• 2012-02-29: Checked to n = 3180000, Borys Jaworski
• 2012-01-31: Checked to n = 3160000, Borys Jaworski
• 2011-12-31: Checked to n = 3140000, Borys Jaworski
• 2011-11-30: Checked to n = 3120000, Borys Jaworski
• 2011-10-31: Checked to n = 3090000, Borys Jaworski
• 2011-09-30: Checked to n = 3060000, Borys Jaworski
• 2011-09-01: Checked to n = 3030000, Borys Jaworski
• 2011-06-30: Checked to n = 2960000, Borys Jaworski
• 2011-06-01: Checked to n = 2930000, Borys Jaworski
• 2011-03-31: Checked to n = 2880000, Borys Jaworski
• 2011-02-28: Checked to n = 2840000, Borys Jaworski
• 2011-01-31: Checked to n = 2820000, Borys Jaworski
• 2011-01-03: Checked to n = 2790000, Borys Jaworski
• 2010-11-30: Checked to n = 2720000, Borys Jaworski
• 2010-10-31: Checked to n = 2670000, Borys Jaworski
• 2010-09-30: Checked to n = 2630000, Borys Jaworski
• 2010-09-01: Checked to n = 2580000, Borys Jaworski
• 2010-08-01: Checked to n = 2530000, Borys Jaworski
• 2010-06-30: Checked to n = 2480000, Borys Jaworski
• 2010-05-31: Checked to n = 2420000, Borys Jaworski
• 2010-04-30: Checked to n = 2360000, Borys Jaworski
• 2010-03-31: Checked to n = 2300000, Borys Jaworski
• 2010-02-28: Checked to n = 2230000, Borys Jaworski
• 2010-01-31: Checked to n = 2170000, Borys Jaworski
• 2009-12-31: Checked to n = 2100000, Borys Jaworski
• 2009-12-01: Checked to n = 2040000, Borys Jaworski
• 2009-11-09: Reserved by Borys Jaworski
• 2007-12-02: Reserved by Carlos Eduardo Pinho
• 2007-09-17: Checked to n = 2000000, Larry Soule
• 2007-09-10: Checked to n = 1990000, Larry Soule
• 2007-07-23: Checked to n = 1880000, Larry Soule
• 2006-01-29: Found n = 307755, Larry Soule
• 1998-12-01: Found n = 38019, Wilfrid Keller