Riesel primes of the form 745•2n-1

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

Current data

k , b : 745 , 2 Count : 25 Nash : 1600 Max n : 2,170,000 Date : 2024-04-02 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 9, 19, 21, 73, 169, 359, 1001, 1351, 2413, 4959, 14159, 38779, 41793, 44483, 59711, 75771, 260463, 333239, 433969, 502499, 657911, 718939, 1494273, 2121591

History

• 2023-07-30: Found n = 2121591, Göran Schmidt
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2018-01-06: Found n = 1494273, Ian M. Gunn
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2009-10-16: Found n = 718939, Vaughan Davies
• 2009-05-08: Found n = 657911, 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
• 2008-07-14: Found n = 502499, Gary Barnes
• 2008-05-15: Found n = 433969, Bruce E. Slade
• 2008-03-25: Checked to n = 333200, NPLB Drive 2, released
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-22: Found n = 333239, Gary Barnes
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2001-07-06: Found n = 75771, Kimmo Herranen