A216375 Numbers k such that 11^k + k^11 + 1 is prime.

0, 1, 5, 941, 23071

Offset

1,3

Comments

a(6) > 10^5. - Robert Price, Jan 16 2013

Links

Table of n, a(n) for n=1..5.

Mathematica

Select[Range[0, 5000], PrimeQ[11^# + #^11 + 1] &]

Prog

(PARI) is(n)=isprime(11^n+n^11+1) \\ Charles R Greathouse IV, Feb 17 2017

Crossrefs

Cf. A100357, A215434-A215445.

Sequence in context: A093853 A195627 A318066 * A157332 A332195 A229203

Adjacent sequences: A216372 A216373 A216374 * A216376 A216377 A216378

Keyword

nonn,hard,more

Author

Vincenzo Librandi, Sep 06 2012

Extensions

a(5) from Robert Price, Jan 16 2014

Status

approved