Riesel primes of the form 619•2n-1

Reserved! This sequence is currently part of Multi Reservation 3: NPLB Drive 18.

Current data

k , b : 619 , 2 Count : 47 Nash : 2625 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 7, 11, 13, 15, 17, 25, 29, 41, 77, 91, 121, 195, 271, 351, 807, 869, 977, 1805, 2735, 4635, 5545, 5731, 7619, 12543, 32539, 40693, 51207, 58619, 62209, 89371, 93361, 108347, 125527, 137389, 179303, 185191, 218317, 301387, 353063, 378539, 402923, 613139, 1117103, 1335307, 1436227

History

• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2016-07-31: Found n = 1436227, Max Dettweiler
• 2014-08-26: Found n = 1335307, Gary Barnes
• 2012-04-17: Found n = 1117103, Max Dettweiler
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2009-01-06: Found n = 613139, Gary Barnes
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-15: Found n = 378539, James P. Burt
• 2008-03-09: Found n = 402923, James P. Burt
• 2008-02-19: Found n = 353063, Gary Barnes
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-12-18: Found n = 218317, Steven Harvey
• 2004-09-07: Found n = 185191, Steven Harvey
• 2004-08-31: Found n = 179303, Steven Harvey
• 2003-07-30: Found n = 125527, Steven Harvey
• 2002-07-02: Found n = 108347, Kimmo Herranen