Riesel primes of the form 859•2n-1

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

Current data

k , b : 859 , 2 Count : 45 Nash : 1984 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 5, 11, 15, 27, 39, 43, 47, 71, 75, 131, 255, 307, 659, 695, 747, 887, 947, 1107, 1287, 3911, 5315, 8119, 13187, 14167, 16437, 23759, 33351, 68587, 70263, 74383, 109251, 129491, 133135, 218511, 304621, 314437, 316251, 605575, 1062379, 1726015, 1726419, 1870639, 1935299, 2172477

History

• 2024-04-09: Found n = 2172477, Göran Schmidt, NPLB Drive 18
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000 < n < 3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2023-01-08: Found n = 1935299, Max Dettweiler, NPLB Drive 14
• 2022-12-20: Found n = 1870639, Göran Schmidt, NPLB Drive 14
• 2022-06-07: Found n = 1726419, Göran Schmidt, NPLB Drive 14
• 2022-06-07: Found n = 1726015, Timothy Sorbera, NPLB Drive 14
• 2012-03-02: Found n = 1062379, Brian Lody, NPLB Drive 14
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000 < n ≤ 2000000
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2009-01-02: Found n = 605575, Ian M. Gunn, NPLB Drive 7
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000 < n ≤ 1000000
• 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
• 2004-09-09: Found n = 218511, Peter Benson
• 2003-01-01: Found n = 109251, Steven Harvey