Riesel primes of the form 12587•2n-1

Current data

k , b : 12587 , 2  (sieve) Type : Low Count : 7 Nash : 591 Max n : 1,000,000 Date : 2023-10-03

14, 34, 38, 98, 538, 26638, 2462524

Remarks :

Available sieve file: n=500k–2.5M, P=100T, 23869 candidates For additional n ≡ 0 mod 4 history, see Conjectures 'R Us search at Riesel 12587•16n-1.

History

• 2023-10-03: Checked to n = 1000000, Alexander Jones, only n !≡ 0 mod 4, releasing
• 2023-09-27: Checked to n = 600000, Alexander Jones, only n !≡ 0 mod 4
• 2023-09-27: Reserved by Alexander Jones
• 2021-11-11: Sieve file created: n = 500000–2500000, Alexander Jones, releasing
• 2021-10-22: Checked to n = 500000, Alexander Jones
• 2021-10-11: Reserved by Alexander Jones
• 2021-10-09: Checked to n = 150000, Alexander Jones
• 2021-08-16: Checked to n = 50000, Alexander Jones
• 2017-05-24: Found n = 2462524, Kenneth Egtved Pedersen, Conjectures 'R Us
• 2017-04-12: Checked to n = 2400000, Kenneth Egtved Pedersen, Conjectures 'R Us, only n ≡ 0 mod 4
• 2011-11-23: Checked to n = 20000, Thomas Ritschel