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%I #21 Jun 13 2017 13:40:31
%S 1,29,35,1309,84379
%N Positive numbers n such that 11^n + n + 1 is prime.
%C 11^n + n + 1 for n = 84379 is a probable prime.
%C There are no further terms up to 100000.
%t Do[ If[PrimeQ[11^m + m + 1 ] , Print[m]], {m, 5000}]
%o (PARI) is(n)=ispseudoprime(11^n+n+1) \\ _Charles R Greathouse IV_, Jun 13 2017
%Y Cf. A005808, A046867, A109076.
%K nonn
%O 1,2
%A _Matevz Markovic_, Jun 30 2011
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