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A177879 The smallest odd prime factor of the Lucas-Lehmer number A003010(n). 1
7, 97, 31, 708158977, 127, 22783, 113210499946729046527, 12289 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

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

LINKS

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

Mersenne primes

EXAMPLE

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

CROSSREFS

Cf. A000040, A003010, A000668

Sequence in context: A054932 A217240 A222834 * A090687 A116125 A142315

Adjacent sequences:  A177876 A177877 A177878 * A177880 A177881 A177882

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified December 2 19:13 EST 2016. Contains 278683 sequences.