A173974 Numbers k such that k^k+43 is prime.

2, 8, 14, 26, 84, 574

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Mar 03 2010

Keywords

• nonn

Comments

a(7) > 3000. - Daniel Starodubtsev, Aug 06 2019

Examples

			2^2 + 43 = 47, which is prime, so 2 is in the sequence.
		

Crossrefs

Cf. A100837, A100838, A100839.

Programs

Mathematica

f[n_]:=PrimeQ[n^n+43];lst={};Do[If[f[n],AppendTo[lst,n]],{n,6!}];lst

PARI

is(n)=ispseudoprime(n^n+43) \\ Charles R Greathouse IV, Jun 13 2017