Riesel primes of the form 813•2n-1

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

Current data

k , b : 813 , 2 Type : 3 Count : 49 Nash : 2437 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 4, 11, 14, 20, 31, 38, 58, 62, 82, 227, 350, 500, 874, 1187, 1424, 2342, 3047, 3356, 3854, 3914, 5308, 6694, 7903, 10091, 12019, 15016, 17654, 19364, 27446, 28948, 31144, 31340, 32660, 38411, 40678, 94702, 173494, 265886, 283174, 406580, 589384, 891218, 1585226, 1703134, 1859419, 2060392, 2129567, 2225840

History

• 2024-10-28: Found n = 2225840, Göran Schmidt, NPLB Drive 18
• 2023-10-08: Found n = 2129567, Göran Schmidt, NPLB Drive 18
• 2023-03-18: Found n = 2060392, Max Dettweiler, 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
• 2022-12-15: Found n = 1859419, Göran Schmidt
• 2022-04-01: Found n = 1703134, Timothy Sorbera
• 2021-02-27: Found n = 1585226, Gary Barnes
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
• 2011-04-09: Found n = 891218, Lennart Vogel
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
• 2008-12-12: Found n = 589384, David James
• 2008-05-14: Found n = 406580, 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
• 2004-05-20: Found n = 173494, Dale Andrews