Riesel primes of the form 21897•2n-1

Current data

k , b : 21897 , 2 Type : 3 Count : 22 Nash : 1687 Max n : 400,000 Date : 2024-10-23

1, 2, 4, 5, 17, 26, 86, 146, 157, 178, 596, 949, 1556, 2305, 4145, 42730, 166858, 169028, 295322, 379741, 382706, 393716

History

• 2024-10-23: Checked n = 200000 - 400000, Alexander Jones, results included, released
• 2024-10-17: Checked n = 50000 - 200000, Alexander Jones, results included
• 2024-10-12: Reserved by Alexander Jones for n = 50000 - 400000
• 2020-08-29: Checked n = 1 - 50000, Alexander Jones
• 2011-11-23: Checked n = 1 - 1007, Gary Barnes
• 2008-02-06: Found n = 393716, Shane Findley