Seqfans:
> %I A242927
> %S 1,2,6,42
> %N Numbers n such that k^n + (k+1)^n + ... + (k+n-1)^n is prime for some k.
There's only one more term of A242927: a(5)=1806. A resulting
"prime" (k=3081) has 6663 digits: so far it's just a rather strong
(Miller-Rabin) probable prime.
Is it possible to prove primality for such a big number?
--
Don Reble djr at nk.ca