Riesel primes of the form 909•2n-1

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

Current data

k , b : 909 , 2 Type : 3 Count : 59 Nash : 3119 Max n : 2,200,000 Date : 2024-07-30 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

4, 7, 9, 11, 16, 17, 27, 31, 44, 95, 107, 185, 208, 209, 275, 281, 332, 355, 407, 412, 768, 1036, 1128, 1611, 1648, 2044, 2292, 2511, 3771, 3847, 3919, 15065, 16411, 18556, 21960, 33564, 35980, 44735, 45587, 45892, 77984, 84351, 87284, 113716, 183784, 197712, 202359, 231995, 248539, 287819, 340456, 353416, 367912, 683019, 750689, 862551, 975659, 1341455, 2056937

History

• 2023-03-17: Found n = 2056937, Max Dettweiler
• 2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
• 2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
• 2014-09-16: Found n = 1341455, 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
• 2011-06-20: Found n = 975659, Gary Barnes
• 2011-04-07: Found n = 862551, Sascha Beat Dinkel
• 2010-03-03: Found n = 750689, Karsten Bonath
• 2009-05-15: Found n = 683019, Ian M. Gunn
• 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
• 2008-02-29: Found n = 367912, James P. Burt
• 2008-02-26: Found n = 353416, Timothy Sorbera
• 2008-01-29: Found n = 340456, Karsten Bonath
• 2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
• 2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
• 2005-03-27: Found n = 248539, Peter Benson
• 2005-03-24: Found n = 231995, Peter Benson
• 2005-03-10: Found n = 202359, Steven Harvey
• 2004-09-24: Found n = 197712, Steven Harvey
• 2004-09-23: Found n = 183784, Steven Harvey
• 2003-05-14: Found n = 113716, Steven Harvey