Riesel primes of the form 473•2n-1

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

Current data

k , b : 473 , 2 Count : 26 Nash : 1299 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

6, 36, 60, 66, 68, 140, 200, 738, 1526, 4460, 5118, 6984, 14574, 17448, 17778, 20226, 23864, 43628, 172100, 246354, 325256, 374414, 626184, 1063908, 1418790, 2130944

History

• 2022-11-01: Found n = 2130944, Florian Piesker
• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2015-07-16: Found n = 1418790, Gary Barnes
• 2011-11-09: Found n = 1063908, Sascha Beat Dinkel
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2009-01-31: Found n = 626184, Gary Barnes
• 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
• 2008-03-11: Found n = 374414, 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
• 2005-05-25: Found n = 246354, Shusuke Kubota
• 2004-07-12: Found n = 172100, Steven Harvey