1,2

Also numbers n such that (16*10^n+17)/3 is prime.

Makoto Kamada, Factorizations of 533...339.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(16*10^n + 17)/3], Print[n]], {n, 0, 10000}]

Sequence in context: A023303 A106874 A023331 this_sequence A166958 A112056 A033231

Adjacent sequences: A103009 A103010 A103011 this_sequence A103013 A103014 A103015

nonn

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