Riesel primes of the form 827•2n-1

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

Current data

k , b : 827 , 2 Count : 33 Nash : 1944 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 8, 20, 26, 28, 40, 70, 94, 110, 152, 244, 298, 344, 692, 1172, 3086, 3146, 4280, 4820, 6640, 9050, 13490, 23974, 36478, 38822, 102640, 189814, 350594, 456544, 505402, 1219466, 1324334, 2156678

History

• 2024-02-06: Found n = 2156678, Göran Schmidt
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2014-07-06: Found n = 1324334, Lennart Vogel
• 2012-07-12: Found n = 1219466, Brian Lody
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
• 2008-06-20: Found n = 505402, Glenn C. Kaiser
• 2008-05-25: Found n = 456544, Lennart Vogel
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-02-13: Found n = 350594, James P. Burt
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-12-10: Found n = 189814, Steven Harvey
• 2002-11-07: Found n = 102640, Steven Harvey