Riesel primes of the form 305•2n-1

Current data

k , b : 305 , 2 Type : Low Count : 15 Nash : 809 Max n : 5,000,000 Date : 2024-08-15

8, 14, 30, 78, 86, 240, 842, 8430, 41982, 48038, 86934, 104646, 115782, 662808, 2358854

History

• 2024-08-15: Checked to n = 5000000, NPLB Drive High-n, released
• 2022-06-03: Reserved by NPLB Drive High-n, for 3000000<n<5000000
• 2022-06-03: Checked to n = 3000000, NPLB Drive 15, released
• 2018-02-27: Found n = 2358854, Ricky L. Hubbard
• 2014-12-29: Reserved by NPLB Drive 15, for n=2000000-3000000
• 2012-10-10: Checked to n = 1300000, Gary Barnes, double-checked, released
• 2012-09-25: Reserved by Gary Barnes, for 1000000<n<1300000
• 2012-04: Checked to n = 2000000, Dmitry Domanov
• 2010-06-26: Reserved by Dmitry Domanov
• 2009-01-01: Checked to n = 1000000, Carlos Eduardo Pinho, released, results not available anymore
• 2008-12-27: Checked to n = 900000, Carlos Eduardo Pinho, results not available anymore
• 2008-11-10: Checked to n = 600000, NPLB Drive 3, released
• 2008-10-16: Checked to n = 800000, Carlos Eduardo Pinho, results not available anymore
• 2008-10-09: Reserved by Carlos Eduardo Pinho, for 700000<n<1000000
• 2008-08-26: Checked to n = 700000, Carlos Eduardo Pinho, released
• 2008-08-03: Found n = 662808, Carlos Eduardo Pinho
• 2008-08-04: Checked to n = 700000, Carlos Eduardo Pinho, results included
• 2008-08-02: Reserved by Carlos Eduardo Pinho, for 600000<n<1000000
• 2008-03-01: Reserved by NPLB Drive 3, for 260000<n<600000
• 2001-12-31: Found n = 115782, James S. Griffin
• 2001-12-31: Found n = 104646, James S. Griffin
• 2001-07-23: Found n = 86934, Sander Hoogendoorn