1,2

Also numbers n such that (16*10^n-43)/9 is prime.

Makoto Kamada, Factorizations of 177...773.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(16*10^n - 43)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A150671 A150672 A150673 this_sequence A100504 A099416 A101696

Adjacent sequences: A102939 A102940 A102941 this_sequence A102943 A102944 A102945

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 16 2004