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A176689
Prime factors of 2^128 - 1.
0
3, 5, 17, 257, 641, 65537, 274177, 6700417, 67280421310721
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..9.
MATHEMATICA
First/@FactorInteger[2^128-1]
PROG
(PARI) factor(2^128 - 1)[, 1] \\
Charles R Greathouse IV
, Sep 06 2016
CROSSREFS
Cf.
A000215
,
A002590
,
A019434
,
A023394
,
A050922
,
A070592
.
Sequence in context:
A373580
A307843
A023394
*
A256510
A260377
A056130
Adjacent sequences:
A176686
A176687
A176688
*
A176690
A176691
A176692
KEYWORD
fini
,
full
,
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky
, Apr 23 2010
EXTENSIONS
Edited by
T. D. Noe
, May 06 2010
Typo in definition corrected by
Arkadiusz Wesolowski
, Feb 17 2011
STATUS
approved
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Last modified August 10 13:41 EDT 2024. Contains 375056 sequences. (Running on oeis4.)