Information as of 2020-05-19: Data for Riesel 600<k<800 online.

Riesel primes of the form 261•2n-1

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Current data

k-value : 261
Count : 46
Nash : 2394
Max n : 2,000,000
Date : 2013-03-08
1[1], 3[2], 6, 9[3], 21, 34, 43, 49, 114[4], 115, 178, 322, 411, 438, 454, 589, 598, 754, 801, 1173, 1546, 1699, 2155, 2994, 4038, 5439, 6442, 10699, 12274, 13314, 13911, 19309, 28675, 29658, 31173, 33606, 65763, 90861, 116706, 185823, 618918, 660709, 802123, 827599, 850383, 1843555

Notes

  1. Twin
  2. Twin
  3. Twin
  4. Sophie Germain

History