1,2

Also numbers n such that (17*10^n-53)/9 is prime.

Makoto Kamada, Factorizations of 188...883.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(17*10^n - 53)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A065778 A091118 A064804 this_sequence A058901 A059756 A165338

Adjacent sequences: A102941 A102942 A102943 this_sequence A102945 A102946 A102947

more,nonn

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