Riesel primes of the form 27391•2n-1

Current data

k , b : 27391 , 2 Count : 42 Nash : 2059 Max n : 400,000 Date : 2025-03-26

7, 9, 11, 15, 55, 63, 69, 303, 369, 541, 559, 591, 613, 621, 771, 1453, 1763, 1833, 2085, 2281, 2411, 5059, 6325, 7515, 8907, 10015, 10671, 12255, 16397, 16553, 18907, 29161, 38429, 41407, 79569, 84527, 94843, 146897, 146953, 208849, 302165, 357175

History

• 2025-03-26: Checked n = 200000 - 400000, Alexander Jones, released
• 2024-10-17: Sieve file created: n = 200000-400000, Alexander Jones
• 2024-10-17: Checked n = 50000 - 200000, Alexander Jones, results included
• 2024-10-12: Reserved by Alexander Jones for n = 50000 - 400000
• 2020-08-30: Checked n = 1 - 50000, Alexander Jones
• 2011-11-23: Checked n = 1 - 1007, Gary Barnes
• 2008-06-26: Found n = 357175, Chris Chatfield