Riesel primes of the form 475•2n-1

Reserved! This sequence is currently part of Multi Reservation 8: NPLB Drive 17.

Current data

k , b : 475 , 2 Count : 30 Nash : 1676 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

5, 11, 15, 21, 35, 105, 141, 151, 185, 191, 355, 365, 943, 1905, 2247, 2901, 3687, 5681, 41177, 64043, 92051, 143585, 402945, 811407, 931763, 1089627, 1204215, 1290255, 1291353, 1464057

History

• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2017-06-04: Found n = 1464057, Jussi Heino
• 2013-08-11: Found n = 1291353, Gary Barnes
• 2013-08-11: Found n = 1290255, Gary Barnes
• 2013-04-24: Found n = 1204215, Gary Barnes
• 2012-01-08: Found n = 1089627, Vaughan Davies
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2010-10-29: Found n = 931763, Lennart Vogel
• 2010-05-27: Found n = 811407, Lennart Vogel
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-03-09: Found n = 402945, 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
• 2001-05-13: Found n = 92051, Michael Ian Hartley