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Proth primes of the form 21•2n+1

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Current data

k , b : 21 , 2
Type : 3
Count : 48
Nash : 2374
Max n : 1,860,000
Date : 2020-06-04
1[1], 4, 5, 7[2], 9, 12, 16, 17, 41, 124, 128, 129, 187, 209, 276, 313, 397, 899, 1532, 1613, 1969, 2245, 2733, 4585, 4644, 6712, 6981, 13344, 17524, 27124, 29769, 47337, 55828, 91008, 94801, 164901, 179457, 191337, 200568, 220992, 686632, 856865, 1022168, 1240067, 1421741, 1830919, 3065701, 6048861

Notes

  1. ↑ Twin n=1
  2. ↑ Twin n=7
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