login
This site is supported by donations to The OEIS Foundation.

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified April 21 12:08 EDT 2014. Contains 240824 sequences.