Riesel primes of the form 207•2n-1

Current data

k , b : 207 , 2 Type : 3 Count : 37 Nash : 1798 Max n : 2,000,000 Date : 2021-02-13

2, 9, 12, 17, 20, 21, 50, 53, 132, 168, 341, 360, 381, 501, 1065, 1169, 1545, 2109, 2520, 2661, 3149, 4077, 11252, 21588, 21692, 39509, 52685, 67196, 87708, 232436, 372312, 417818, 481385, 507833, 643478, 912512, 1453970

History

• 2021-02-13: Checked to n = 2000000, Steven Tjung, released
• 2016-01-27: Checked to n = 2000000, Steven Tjung
• 2014-01-13: Checked to n = 1730000, Steven Tjung
• 2014-09-13: Checked to n = 1700000, Steven Tjung
• 2014-02-03: Checked to n = 1590000, Steven Tjung
• 2013-11-06: Found n = 1453970, Steven Tjung
• 2013-08-22: Checked to n = 1342000, Steven Tjung
• 2013-04-05: Checked to n = 1200000, Steven Tjung
• 2012-11-03: Checked to n = 1100000, Steven Tjung
• 2012-10-19: Checked to n = 1084000, Steven Tjung
• 2012-08-19: Checked to n = 1030000, Steven Tjung
• 2009-12-05: none, Steven Tjung
• 2009-10-06: Checked to n = 1000000, Steven Tjung
• 2009-05-15: Checked to n = 925000, Steven Tjung
• 2009-05-14: Found n = 912512, Steven Tjung
• 2009-04-06: Checked to n = 900000, Steven Tjung
• 2009-02-12: Checked to n = 845000, Steven Tjung
• 2008-01-31: Checked to n = 704000, Steven Tjung
• 2008-01-04: Checked to n = 662000, Steven Tjung
• 2007-12-08: Checked to n = 646000, Steven Tjung
• 2007-12-07: Found n = 643478, Steven Tjung
• 2007-11-01: none, Steven Tjung
• 2007-07-13: Checked to n = 586000, Steven Tjung
• 2007-07-13: Checked to n = 583000, Steven Tjung
• 2007-05-14: Found n = 507833, Steven Tjung
• 2007-05-01: Found n = 481385, Steven Tjung
• 2007-03-16: Found n = 417818, Steven Tjung
• 2007-03-15: Found n = 372312, Steven Tjung
• 2004-08-05: Found n = 232436, Mark Anderson
• 1989: Found n = 67196, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown