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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