Riesel primes of the form 601•2n-1

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

Current data

k , b : 601 , 2 Count : 26 Nash : 1501 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 5, 9, 19, 37, 199, 447, 461, 677, 1241, 1601, 1651, 1969, 2827, 4735, 8259, 11449, 27465, 32975, 43927, 50741, 64527, 124011, 550691, 635375, 787177

History

• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2010-11-10: Found n = 787177, Brian Lody
• 2009-04-24: Found n = 635375, 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
• 2008-11-24: Found n = 550691, Ian M. Gunn
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2002-06-13: Found n = 124011, Kimmo Herranen