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Proth primes of the form 28•3n+1

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Current data

k , b : 28 , 3
Count : 16
Nash : 2394
Max n : 300,000
Date : 2024-09-22
3[1], 4[2], 8[3], 11, 14, 15[4], 18[5], 495[6], 2475[7], 3538, 5188, 34870, 83394[8], 119016[9], 149671, 167190[10]
Remarks :
For additional n ≡ 0 mod 3 history, see Williams 28•27n+1.

Notes

  1. ↑ Williams 28•271+1
  2. ↑ Twin n=4
  3. ↑ Twin n=8
  4. ↑ Williams 28•275+1
  5. ↑ Twin n=18, Williams 28•276+1
  6. ↑ Williams 28•27165+1
  7. ↑ Williams 28•27825+1
  8. ↑ Williams 28•2727798+1
  9. ↑ Williams 28•2739672+1
  10. ↑ Williams 28•2755730+1

History

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