Riesel primes of the form 303•2n-1

Current data

k , b : 303 , 2 Type : 3 Count : 34 Nash : 1488 Max n : 5,000,000 Date : 2024-08-15

3, 6, 7, 12, 19, 24, 102, 159, 198, 258, 426, 664, 852, 1015, 2047, 2307, 3282, 8239, 11886, 14932, 18306, 69568, 90642, 98226, 115272, 144768, 177652, 978724, 2417452, 2562423, 2887603, 2949403, 4471002, 4748019

History

• 2024-08-15: Checked to n = 5000000, NPLB Drive High-n, released
• 2023-08-29: Found n = 4748019, Oliver Kruse, NPLB Drive High-n
• 2022-12-24: Found n = 4471002, Oliver Kruse, NPLB Drive High-n
• 2022-06-03: Reserved by NPLB Drive High-n, for 3000000<n<5000000
• 2022-06-03: Checked to n = 3000000, NPLB Drive 15, released
• 2022-05-26: Found n = 2949403, Gary Barnes
• 2022-05-14: Found n = 2887603, William Byerly
• 2018-11-20: Found n = 2562423, Ricky L. Hubbard
• 2018-06-21: Found n = 2417452, Stuart Mullage
• 2014-12-29: Reserved by NPLB Drive 15, for n=2000000-3000000
• 2012-04: Checked to n = 2000000, Dmitry Domanov
• 2010-06-26: Checked to n = 1500000, Dmitry Domanov
• 2010-03-21: Reserved by Dmitry Domanov, for 1000000<n<2000000
• 2009-01-06: Checked to n = 1000000, Gary Barnes, released
• 2009-01-01: Checked to n = 987000, Gary Barnes
• 2008-12-29: Found n = 978724, Gary Barnes
• 2008-12-26: Checked to n = 972000, Gary Barnes
• 2008-11-28: Checked to n = 960000, Gary Barnes
• 2008-11-14: Checked to n = 939000, Gary Barnes
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-10-31: Checked to n = 924000, Gary Barnes
• 2008-09-10: Checked to n = 901000, Gary Barnes
• 2008-09-03: Checked to n = 890000, Gary Barnes
• 2008-08-22: Checked to n = 858000, Gary Barnes
• 2008-08-13: Checked to n = 835000, Gary Barnes
• 2008-08-07: Checked to n = 825000, Gary Barnes
• 2008-07-24: Checked to n = 786000, Gary Barnes
• 2008-07-14: Checked to n = 750000, Gary Barnes
• 2008-07-04: Checked to n = 707000, Gary Barnes
• 2008-06-17: Checked to n = 635000, Gary Barnes
• 2008-06-01: Reserved by Gary Barnes, for 600000<n<1000000
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2003-07-16: Found n = 177652, James S. Griffin
• 2003-07-14: Found n = 144768, James S. Griffin
• 2001-12-31: Found n = 115272, James S. Griffin
• 2001-07-23: Found n = 98226, Sander Hoogendoorn
• 2001-02-20: Found n = 90642, Kimmo Herranen
• 2001-01-20: Found n = 69568, Kimmo Herranen