1,1

Also numbers n such that (74*10^n+43)/9 is prime.

Makoto Kamada, Factorizations of 822...227.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(74*10^n + 43)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A059208 A061471 A112271 this_sequence A062133 A050684 A073214

Adjacent sequences: A103073 A103074 A103075 this_sequence A103077 A103078 A103079

more,nonn

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