Riesel primes of the form 317•2n-1

Current data

k , b : 317 , 2 Count : 28 Nash : 1398 Max n : 3,000,000 Date : 2022-06-03

6, 22, 36, 42, 58, 76, 102, 228, 628, 760, 792, 982, 988, 1168, 3262, 5796, 12340, 29706, 38418, 39166, 194962, 208398, 255508, 290172, 762078, 981378, 1032378, 1991592

History

• 2022-06-03: Checked to n = 3000000, NPLB Drive 15, released
• 2014-12-29: Reserved by NPLB Drive 15, for n=2000000-3000000
• 2014-08-20: Checked to n = 2000000, NPLB Mini Drive 5, released
• 2014-08-19: Found n = 1991592, Lennart Vogel
• 2013-08-17: Reserved by NPLB Mini Drive 5 from n=1300000 (Port 7000)
• 2012-10-10: Checked to n = 1300000, Gary Barnes, released
• 2014-08-19: Reserved by NPLB Mini Drive 5, for 1300000<n<2000000
• 2012-09-25: Reserved by Gary Barnes, for 1200000<n<1300000
• 2011-06-26: Checked to n = 1209600, Johnathan Chu, released
• 2011-04-17: Checked to n = 1170000, Johnathan Chu
• 2011-03-11: Checked to n = 1130000, Johnathan Chu
• 2011-02-09: Checked to n = 1090000, Johnathan Chu
• 2011-01-11: Checked to n = 1060000, Johnathan Chu
• 2010-12-14: Found n = 1032378, Johnathan Chu
• 2010-12-07: Reserved by Johnathan Chu, to n=1100000
• 2010-11-27: Reserved by Johnathan Chu, for 1000000<n<1020000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-09-15: Checked to n = 1000000, Borys Jaworski, released
• 2008-08-12: Found n = 981378, Borys Jaworski
• 2008-08-12: Checked to n = 900000, Borys Jaworski
• 2008-07-10: Checked to n = 800000, Borys Jaworski
• 2008-06-25: Found n = 762078, Borys Jaworski
• 2008-06-09: Checked to n = 700000, Borys Jaworski
• 2008-05-09: Reserved by Borys Jaworski, for 600000<n<1000000
• 2008-03-06: 290172 confirmed, James P. Burt
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2005-06-13: Found n = 255508, Shusuke Kubota
• 2004-12-27: Found n = 208398, Steven Harvey
• 2002-07-28: Found n = 194962, Dennis Okon