Riesel primes of the form 197•2n-1

Reserved! This sequence is currently reserved by: Tanel Liiv

Current data

k , b : 197 , 2 Count : 38 Nash : 1573 Max n : 5,500,000 Date : 2023-11-01 Reserved : Tanel LiivTanel Liiv/Reserved

2, 16, 20, 22, 40, 82, 112, 178, 230, 302, 304, 328, 374, 442, 472, 500, 580, 694, 1264, 1634, 1784, 3080, 5722, 7174, 8908, 18502, 18746, 39094, 99338, 170066, 202534, 325610, 510940, 569222, 635042, 825188, 1796284, 4765318

History

• 2023-11-01: Checked to n = 5500000, Tanel Liiv
• 2021-10-01: Checked to n = 5000000, Tanel Liiv
• 2021-04-29: Found n = 4765318, Tanel Liiv
• 2021-02-02: Checked to n = 4600000, Tanel Liiv
• 2020-09-21: Checked to n = 4200000, Tanel Liiv
• 2020-06-11: Checked to n = 3700000, Tanel Liiv
• 2020-03-13: Reserved by Tanel Liiv from n=3020000
• 2020-03-13: Checked to n = 3020000, Michael Curtis, released
• 2017-07-03: Checked to n = 3000000, Michael Curtis
• 2016-01-03: Checked to n = 2500000, Michael Curtis
• 2015-04-01: Checked to n = 2000000, Michael Curtis
• 2015-02-17: Found n = 1796284, Michael Curtis
• 2014-10-05: Checked to n = 1640000, Michael Curtis
• 2014-03-07: Checked to n = 1530000, Michael Curtis
• 2013-12-07: Checked to n = 1500000, Michael Curtis
• 2013-06-11: Checked to n = 1440000, Michael Curtis
• 2012-05-04: Checked to n = 1400000, Michael Curtis
• 2011-04-27: Reserved by Michael Curtis
• 2009-02-13: Checked to n = 1200000, Michael Curtis, released
• 2008-07-14: Checked to n = 1140000, Michael Curtis
• 2008-03-15: Checked to n = 1100000, Michael Curtis
• 2008-02-22: Checked to n = 1030000, Michael Curtis
• 2008-01-13: Checked to n = 970000, Michael Curtis
• 2007-11-21: none, Michael Curtis
• 2007-10-24: none, Michael Curtis
• 2007-09-10: Checked to n = 950000, Michael Curtis
• 2007-07-30: Checked to n = 950000, Michael Curtis
• 2007-07-18: Checked to n = 882000, Michael Curtis
• 2007-07-01: Found n = 825188, Michael Curtis
• 2007-05-06: Found n = 635042, Michael Curtis
• 2007-02-16: Found n = 569222, Michael Curtis
• 2007-02-02: Found n = 510940, Michael Curtis
• 2006-11-13: Found n = 325610, Michael Curtis
• 2004-07-26: Found n = 202534, Mark Anderson
• 2004-07-09: Found n = 170066, Mark Anderson