Williams primes of the form 4•3n+1

Current data

Base : 3 Count : 28 Max n : 1,500,000 Date : 2020-01-16

1, 2, 3, 6, 14, 15, 39, 201, 249, 885, 1005, 1254, 1635, 3306, 3522, 9602, 19785, 72698, 233583, 328689, 537918, 887535, 980925, 1154598, 1499606, 1936890, 2016951, 2143374

Remarks :

The sequence A005537 in OEIS For all even n-values 4•3n+1 is a Generalized Fermat number. !!!DO NOT RESERVE!!! This list is a reuse of Proth 4•3n+1.