1,2

Also numbers n such that (14*10^n-23)/9 is prime.

Makoto Kamada, Factorizations of 155...553.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(14*10^n - 23)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A051169 A051610 A102356 this_sequence A009192 A013273 A013277

Adjacent sequences: A102933 A102934 A102935 this_sequence A102937 A102938 A102939

more,nonn

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