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Riesel primes of the form 20421•2n-1

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Current data

k , b : 20421 , 2
Type : 3
Count : 27
Nash : 2181
Max n : 50,000
Date : 2020-08-12
1, 3, 13[1], 15[2], 27, 42, 57[3], 58, 114, 282, 291, 351, 435, 483, 507, 823, 847, 1119, 1698, 4005, 16255, 20163, 29211, 31515, 38530, 49413, 485253

Notes

  1. ↑ Twin n=13
  2. ↑ Twin n=15
  3. ↑ Sophie Germain n=57

History

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