1,1

Also numbers n such that (86*10^n-23)/9 is prime.

Makoto Kamada, Factorizations of 955...553.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(86*10^n - 23)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A086755 A107483 A035599 this_sequence A009357 A052361 A001884

Adjacent sequences: A103098 A103099 A103100 this_sequence A103102 A103103 A103104

more,nonn

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