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Proth primes of the form 8•3n+1

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Current data

k , b : 8 , 3
Count : 23
Nash : 2226
Max n : 1,250,000
Date : 2020-08-08
2[1], 7, 8, 10[2], 22, 52, 58, 76, 130, 143, 331, 332, 980, 1282, 1655, 4031, 4600, 18880, 89482, 130592, 323860, 872171, 1172480
Remarks :
See also Williams 8•9n+1
The sequence A005538 in OEIS

Notes

  1. Twin n=2
  2. Twin n=10

History