1,1

Also numbers n such that (26*10^n-17)/9 is prime.

Makoto Kamada, Factorizations of 288...887.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(26*10^n - 17)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A110593 A049368 A152733 this_sequence A076510 A038060 A135504

Adjacent sequences: A102959 A102960 A102961 this_sequence A102963 A102964 A102965

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 17 2004