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

0, 1, 5, 941, 23071

Offset: 1

Author

Vincenzo Librandi, Sep 06 2012

Keywords

• nonn
• hard
• more

Comments

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

Crossrefs

Cf. A100357, A215434-A215445.

Programs

Mathematica

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

PARI

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

Extensions

a(5) from Robert Price, Jan 16 2014