A242196 Numbers k such that k*12^k + 1 is prime.

1, 8, 247, 3610, 4775, 19789, 187895

Offset: 1

Author

Vincenzo Librandi, May 08 2014

Keywords

• nonn
• more

Links

• G. Loeh, Generalized Cullen primes

Crossrefs

Cf. similar sequences listed in A242176.

Programs

Magma

[n: n in [0..2300] | IsPrime(n*12^n+1)]

Mathematica

Select[Range[2300], PrimeQ[# 12^# + 1] &]

PARI

is(n)=ispseudoprime(n*12^n+1) \\ Charles R Greathouse IV, Jun 06 2017

Extensions

a(4)- a(7) from Loeh's list (see Links) - Bruno Berselli, May 08 2014