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Generalized Cullen primes of the form n•3n+1

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Current data

ASCII format : n*3^n+1
Base : 3
Count : 17
Max n : 5,000,000
Date : 2023-12-25
2[1], 8[2], 32[3], 54[4], 114[5], 414[6], 1400[7], 1850[8], 2848[9], 4874[10], 7268[11], 19290[12], 337590[13], 1183414[14], 1308596[15], 2220172[16], 9145334[17]
Remarks :
The sequence A006552 in OEIS
See early history at Generalized Cullen primes

Notes

  1. ↑ Twin n=2, Proth 2•32+1
  2. ↑ Proth 8•38+1
  3. ↑ Proth 32•332+1
  4. ↑ Proth 2•357+1
  5. ↑ Proth 38•3115+1
  6. ↑ Proth 46•3416+1
  7. ↑ Proth 1400•31400+1
  8. ↑ Proth 1850•31850+1
  9. ↑ Proth 2848•32848+1
  10. ↑ Proth 4874•34874+1
  11. ↑ Proth 7268•37268+1
  12. ↑ Proth 6430•319291+1
  13. ↑ Proth 37510•3337592+1
  14. ↑ Proth 1183414•31183414+1
  15. ↑ Proth 1308596•31308596+1
  16. ↑ Proth 2220172•32220172+1
  17. ↑ Proth 9145334•39145334+1

History

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