Riesel primes of the form 12257•2n-1

Current data

k , b : 12257 , 2 Count : 30 Nash : 2218 Max n : 50,000 Date : 2021-10-14

4, 6, 14, 18, 20, 26, 40, 50, 66, 136, 188, 200, 226, 240, 338, 490, 494, 834, 1296, 2120, 2738, 4398, 4530, 4694, 5084, 6676, 7880, 21706, 28218, 44120

History

• 2021-10-14: Checked to n = 50000, Alexander Jones
• 2011-11-23: Checked to n = 20000, Thomas Ritschel
• 1989: Found n = 21706, John Brown, Landon Curt Noll, Bodo Parady, Gene Smith, Joel Smith, Sergio Zarantonello