Riesel primes of the form 19539•2n-1

Current data

k , b : 19539 , 2  (sieve) Type : 3 Count : 31 Nash : 2522 Max n : 500,000 Date : 2023-09-16

4, 15, 33, 57, 63, 96, 139, 160, 241, 721, 853, 909, 1300, 1401, 2211, 3388, 3391, 3729, 7603, 33091, 33709, 49200, 79779, 148909, 168507, 174033, 225549, 263335, 313047, 356464, 490165

Remarks :

Available sieve file: n=150k–500k, P=500T, 16632 candidates

History

• 2023-09-16: Checked to n = 500000, Alexander Jones, released
• 2023-03-26: Sieve file created: n = 150000–500000, Alexander Jones, yoyo@home
• 2023-03-26: Reserved by Alexander Jones
• 2021-12-30: Checked to n = 150000, Alexander Jones
• 2021-11-16: Checked to n = 100000, Alexander Jones
• 2020-08-01: Checked to n = 50000, Karsten Bonath
• 2011-09-20: Found n = 490165, Göran Schmidt, Twin Prime Search