Riesel primes of the form 497•2n-1

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

Current data

k , b : 497 , 2 Count : 28 Nash : 1209 Max n : 2,820,000 Date : 2024-03-09 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 4, 18, 24, 72, 74, 218, 268, 456, 826, 1466, 2402, 2592, 3504, 3604, 3792, 7656, 11232, 21036, 33266, 46026, 66912, 216682, 227764, 506812, 688852, 1000426, 1684464

History

• 2022-08-10: Checked to n = 2000000, NPLB Drive 13, released
• 2022-08-09: Reserved by NPLB Drive 17, for 2000000<n<3000000
• 2022-03-04: Found n = 1684464, Florian Piesker
• 2011-08-04: Reserved by NPLB Drive 13, for 1000000<n<2000000
• 2011-07-05: Found n = 1000426, Lennart Vogel
• 2010-11-11: Checked to n = 1000000, NPLB Drive 5
• 2009-05-24: Found n = 688852, David James
• 2008-12-22: Checked to n = 600000, NPLB Drive 1
• 2008-12-19: Reserved by NPLB Drive 5, for 600000<n<1000000
• 2008-07-15: Found n = 506812, Gary Barnes
• 2008-03-25: Checked to n = 333200, NPLB Drive 2
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2004-11-15: Found n = 227764, Steven Harvey
• 2004-11-15: Found n = 216682, Steven Harvey