Riesel primes of the form 15181•2n-1

Current data

k , b : 15181 , 2 Count : 27 Nash : 1784 Max n : 400,000 Date : 2021-10-25

3, 19, 21, 29, 31, 53, 61, 109, 201, 287, 343, 873, 955, 1453, 6689, 7779, 8429, 11643, 27921, 35331, 72681, 73881, 74489, 120489, 182133, 338835, 340113

History

• 2021-10-25: Checked n = 100000 - 400000, Karsten Bonath
• 2021-05-18: Checked to n = 100000, Alexander Jones
• 2020-07-30: Checked to n = 50000, Karsten Bonath
• 2007-07-26: Found n = 340113, Steve Anderegg