1,2

Also numbers n such that (52*10^n-43)/9 is prime.

Makoto Kamada, Factorizations of 577...773.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(52*10^n - 43)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A031330 A052339 A123076 this_sequence A024353 A024354 A020883

Adjacent sequences: A103017 A103018 A103019 this_sequence A103021 A103022 A103023

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 18 2005