1,2

Also numbers n such that (76*10^n+41)/9 is prime.

Makoto Kamada, Factorizations of 844...449.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(76*10^n + 41)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A065297 A067635 A003727 this_sequence A048474 A054761 A080145

Adjacent sequences: A103079 A103080 A103081 this_sequence A103083 A103084 A103085

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005