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Proth primes of the form 4•3n+1

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Reserved! This sequence is currently reserved by: Ryan Propper

Current data

k , b : 4 , 3
Count : 33
Nash : 1703
Max n : 5,000,000
Date : 2024-09-10
Reserved : Ryan PropperRyan Propper/Reserved
1[1], 2, 3[2], 6, 14[3], 15[4], 39, 201, 249, 885, 1005, 1254, 1635, 3306, 3522, 9602, 19785, 72698, 233583, 328689, 537918, 887535, 980925, 1154598, 1499606, 1936890, 2016951, 2143374, 4020126, 6402015, 7578378, 9214845, 11279466
Remarks :
The sequence A005537 in OEIS
For all even n-values 4•3n+1 is a Generalized Fermat number.
See also Williams 4•3n+1

Notes

  1. ↑ Twin n=1
  2. ↑ Twin n=3, Near Cullen 4•33+1
  3. ↑ Near Cullen 12•313+1
  4. ↑ Twin n=15

History

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