Riesel primes of the form 387•2n-1

Reserved! This sequence is currently part of Multi Reservation 26: NPLB Drive 19.

Current data

k , b : 387 , 2 Type : 3 Count : 37 Nash : 1853 Max n : 3,100,000 Date : 2024-08-15 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 6, 16, 21, 28, 36, 40, 81, 88, 93, 97, 153, 165, 213, 612, 852, 877, 1053, 1158, 1437, 2653, 2968, 3060, 3286, 5001, 8061, 9046, 39313, 101868, 125985, 140437, 161646, 633582, 782853, 1709440, 1732185, 1793857

History

• 2023-03-07: Reserved by NPLB Drive 19, for 3000000<n<4000000
• 2023-03-07: Checked to n = 3000000, NPLB Drive 16, released
• 2022-06-03: Reserved by NPLB Drive 16, for 2000000<n<3000000
• 2014-12-28: Checked to n = 2000000, NPLB Maxi Drive 1, released
• 2014-10-19: Found n = 1793857, Göran Schmidt
• 2014-09-24: Found n = 1732185, Lennart Vogel
• 2014-09-16: Found n = 1709440, Timothy Sorbera
• 2014-08-20: Reserved by NPLB Maxi Drive 1, for 1610000<n<2000000
• 2013-04-28: Reserved by NPLB Maxi Drive 1, for 1300000<n<2000000
• 2013-01-14: Reserved by NPLB Maxi Drive 1, for 1000000<n<1300000
• 2009-01-01: Checked to n = 1000000, Ian M. Gunn, released
• 2008-12-26: Found n = 782853, Ian M. Gunn
• 2008-12-16: Checked to n = 700000, Ian M. Gunn
• 2008-12-07: Found n = 633582, Ian M. Gunn
• 2008-12-03: Checked to n = 640000, Ian M. Gunn
• 2008-11-19: Reserved by Ian M. Gunn, for n=600000<n<1000000
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2002-04-17: Found n = 161646, Andrew J. Rupinski
• 2002-04-17: Found n = 140437, Andrew J. Rupinski
• 2002-04-17: Found n = 125985, Andrew J. Rupinski
• 2002-04-17: Found n = 101868, Andrew J. Rupinski
• 1998-11-03: Found n = 39313, Kimmo Herranen