Riesel primes of the form 13•2n-1

Reserved! This sequence is currently reserved by: Michael Curtis

Current data

k , b : 13 , 2 Count : 25 Nash : 1066 Max n : 5,560,000 Date : 2025-02-26 Reserved : Michael CurtisMichael Curtis/Reserved

3, 7, 23, 287, 291, 795, 2203, 5711, 7927, 9443, 10095, 19071, 29611, 34651, 51875, 55343, 77511, 166303, 233207, 2606075, 2642943, 3527315, 3664703, 3675223, 4333087

Remarks :

The sequence A001773 in OEIS

History

• 2025-02-26: Checked n = 4710000 - 5560000, Michael Curtis
• 2024-08-10: Checked n = 4530000 - 4710000, Michael Curtis
• 2023-07-17: Checked n = 4400000 - 4530000, Michael Curtis
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2020-03-13: Checked n = 4190000 - 4400000, Michael Curtis
• 2018-06-20: Found n = 4333087, Michael Curtis
• 2017-07-03: Checked n = 3440000 - 4190000, Michael Curtis
• 2016-04-13: Found n = 3527315, Michael Curtis
• 2016-02-23: Found n = 3675223, Michael Curtis
• 2016-02-18: Found n = 3664703, Michael Curtis
• 2016-01-03: Checked n = 3110000 - 3440000, Michael Curtis
• 2015-04-01: Checked n = 3067000 - 3110000, Michael Curtis
• 2014-10-05: Checked n = 3050000 - 3067000, Michael Curtis
• 2014-03-07: Checked n = 3040000 - 3050000, Michael Curtis
• 2013-09-04: Checked n = 2980000 - 3040000, Michael Curtis
• 2013-06-11: Checked n = 2650000 - 2980000, Michael Curtis
• 2012-05-04: Checked n = 2500000 - 2650000, Michael Curtis
• 2012-02-03: Found n = 2642943, Michael Curtis
• 2011-12-06: Found n = 2606075, Michael Curtis
• 2011-12-04: Checked n = 2290000 - 2500000, Michael Curtis
• 2011-06-02: Checked n = 2180000 - 2290000, Michael Curtis
• 2010-10-28: Checked n = 2120000 - 2180000, Michael Curtis
• 2010-03-21: Checked n = 1800000 - 2120000, Michael Curtis
• 2010-01-12: none, Michael Curtis
• 2009-09-01: none, Michael Curtis
• 2009-02-13: none, Michael Curtis
• 2009-01-10: Checked n = 1500000 - 1800000, Michael Curtis
• 2008-07-14: Checked n = 1300000 - 1500000, Michael Curtis
• 2008-04-30: Checked n = 1250000 - 1300000, Michael Curtis
• 2008-02-22: none, Michael Curtis
• 2008-01-13: Checked n = 1200000 - 1250000, Michael Curtis
• 2007-11-21: none, Michael Curtis
• 2007-10-24: Checked n = 1140000 - 1200000, Michael Curtis
• 2007-09-10: Checked n = 1100000 - 1140000, Michael Curtis
• 2007-08-24: Checked n = 1040000 - 1100000, Michael Curtis
• 2007-07-30: Checked n = 1000000 - 1040000, Michael Curtis
• 2006-08-30: Reserved by Michael Curtis for n = 1000000 - 2000000
• 2004-10-11: Checked n = 945000 - 1000000, Predrag Minovic, released
• 2004-08-15: Checked n = 927000 - 945000, Predrag Minovic
• 2004-08-03: Checked n = 810000 - 927000, Predrag Minovic
• 2004-07-13: Checked n = 450000 - 810000, Predrag Minovic
• 2004-06-14: Checked n = 245000 - 450000, Predrag Minovic
• 2004-05-18: Checked n = 150000 - 245000, Predrag Minovic
• 2004-05-11: Found n = 166303, Predrag Minovic
• 2004-05-10: Checked n = 30000 - 150000, Predrag Minovic
• 2004-05-03: Checked n = 1 - 30000, Predrag Minovic
• 2004-05-02: Reserved by Predrag Minovic
• 2003-09-19: Found n = 233207, Peter Grobstich
• 1999-06-20: Found n = 55343, Michael J. Graef
• 1999-06-15: Found n = 51875, Michael J. Graef
• 1999-05-28: Found n = 34651, Michael J. Graef
• 1998-07-28: Found n = 29611, Wilfrid Keller
• 1998-04-10: Found n = 19071, Ray Ballinger
• 1994: Found n = 7927, Harvey Dubner