1,1

Does this sequence include all of the Mersenne primes greater than 3?

a(8)=12289; a(11)=8191, a(15)=131071

Table of n, a(n) for n=1..8.

Mersenne primes

A003010(3)=37634 and its smallest odd prime factor is 31.

Cf. A000040, A003010, A000668

Sequence in context: A054932 A217240 A222834 * A090687 A116125 A142315

Adjacent sequences: A177876 A177877 A177878 * A177880 A177881 A177882

nonn

G. L. Honaker, Jr., Dec 13 2010

approved