1,2

Also numbers n such that (14*10^n+13)/9 is prime.

Makoto Kamada, Factorizations of 155...557.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(14*10^n + 13)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A099357 A027038 A097052 this_sequence A045358 A128005 A045359

Adjacent sequences: A102934 A102935 A102936 this_sequence A102938 A102939 A102940

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 16 2004