Riesel primes of the form 605•2n-1

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

Current data

k , b : 605 , 2 Count : 26 Nash : 1703 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

4, 44, 54, 58, 74, 114, 652, 678, 944, 1480, 2038, 2212, 3388, 6394, 7940, 11058, 11204, 13184, 30790, 80984, 100258, 329452, 393234, 663508, 672972, 1404118

History

• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2015-07-25: Found n = 1404118, Max Dettweiler
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2009-05-14: Found n = 672972, Gary Barnes
• 2009-05-10: Found n = 663508, Vaughan Davies
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-03-20: Found n = 393234, Gary Barnes
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2002-11-26: Found n = 100258, Steven Harvey
• 2001-07-10: Found n = 80984, Kimmo Herranen