Riesel primes of the form 693•2n-1

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

Current data

k , b : 693 , 2 Type : 3 Count : 59 Nash : 2697 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

4, 6, 11, 15, 55, 60, 62, 71, 84, 86, 103, 139, 176, 187, 299, 331, 452, 455, 732, 847, 878, 924, 1051, 1084, 1164, 1636, 1776, 1832, 1835, 2179, 3063, 3452, 4014, 4804, 6495, 6960, 7543, 7742, 8943, 9887, 25384, 25782, 33055, 35107, 42783, 59672, 65952, 101484, 140843, 254007, 258227, 321959, 417371, 614963, 971735, 1088280, 1255879, 1343535, 2225272

History

• 2024-10-26: Found n = 2225272, 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
• 2014-09-21: Found n = 1343535, Gary Barnes
• 2013-09-26: Found n = 1255879, Gary Barnes
• 2012-03-21: Found n = 1088280, Gary Barnes
• 2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
• 2011-02-08: Checked to n = 1000000, NPLB Drive 6, released
• 2011-01-10: Found n = 971735, James P. Burt
• 2009-01-09: Found n = 614963, David James
• 2008-12-22: Checked to n = 600000, NPLB Drive 1, released
• 2008-12-19: Reserved by NPLB Drive 6, for 600000<n<=1000000
• 2008-04-23: Found n = 417371, Timothy Sorbera
• 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
• 2005-01-26: Found n = 258227, Jean Penné
• 2005-01-25: Found n = 254007, Jean Penné
• 2002-02-07: Found n = 101484, Kimmo Herranen
• 1998-11-08: Found n = 42783, Martijn Olivier Tigchelaar
• 1998-11-06: Found n = 35107, Martijn Olivier Tigchelaar
• 1998-10-21: Found n = 33055, Tim Nikkel
• 1998-10-21: Found n = 25782, Tim Nikkel
• 1998-10-21: Found n = 25384, Tim Nikkel