Riesel primes of the form 355•2n-1

Current data

k , b : 355 , 2 Count : 40 Nash : 2135 Max n : 2,000,000 Date : 2014-12-28

1, 7, 9, 25, 39, 45, 53, 57, 151, 189, 197, 207, 529, 623, 721, 757, 921, 1341, 2193, 7847, 10105, 12989, 20277, 26193, 34253, 34823, 40989, 43063, 47817, 102805, 161327, 169589, 221209, 279801, 378477, 424413, 433303, 719857, 1125573, 1752713

History

• 2014-12-28: Checked to n = 2000000, NPLB Maxi Drive 1, released
• 2014-10-01: Found n = 1752713, Göran Schmidt
• 2014-08-20: Reserved by NPLB Maxi Drive 1, for 1610000<n<2000000
• 2013-04-28: Reserved by NPLB Maxi Drive 1, for 1300000<n<2000000
• 2013-03-07: Found n = 1125573, Karsten Bonath
• 2013-01-14: Reserved by NPLB Maxi Drive 1, for 1000000<n<1300000
• 2009-08-12: Reserved by NPLB Mini Drive 4, for 900000<n<1000000
• 2009-06-18: Reserved by NPLB Mini Drive 4, for 800000<n<900000
• 2009-06-11: Found n = 719857, Chris Chatfield
• 2009-05-29: Reserved by NPLB Mini Drive 4, for 700000<n<800000
• 2009-05-12: Checked to n = 700000, Gary Barnes, released
• 2009-05-09: Checked to n = 690000, Gary Barnes
• 2009-05-05: Checked to n = 675000, Gary Barnes
• 2009-05-01: Checked to n = 664000, Gary Barnes
• 2009-04-27: Checked to n = 640000, Gary Barnes
• 2009-04-15: Reserved by Gary Barnes, for 620000<n<700000
• 2009-04-13: Checked to n = 620000, Karsten Bonath, released
• 2009-03-15: Reserved by Karsten Bonath, for 600000<n<620000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-04-15: Found n = 433303, Karsten Bonath
• 2008-03-31: Found n = 424413, Carlos Eduardo Pinho
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2005-09-03: Found n = 378477, Peter O'braian
• 2005-04-29: Found n = 279801, Peter O'braian
• 2004-11-28: Found n = 221209, Peter O'braian
• 2004-06-10: Found n = 169589, Steven Harvey
• 2004-04-20: Found n = 161327, Steven Harvey
• 2002-08-05: Found n = 102805, Kimmo Herranen