Riesel primes of the form 865•2n-1

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

Current data

k , b : 865 , 2 Type : Low Count : 12 Nash : 946 Max n : 2,300,000 Date : 2025-04-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

9, 15, 17, 77, 215, 5081, 15821, 58097, 68057, 96461, 464001, 555071

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
• 2011-07-11: 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
• 2008-11-22: Found n = 555071, Ian M. Gunn
• 2008-05-29: Found n = 464001, James P. Burt
• 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
• 2002-02-18: Found n = 96461, Kimmo Herranen