OFFSET
1,1
COMMENTS
Note that not all the largest divisors are primes.
Which divisors are prime? - see A145099. - Artur Jasinski, Oct 04 2008
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..183
MATHEMATICA
a = {}; Do[m = 2^Prime[n] - 1; If[PrimeQ[m], null, AppendTo[a, Divisors[m][[ -2]]]], {n, 1, 40}]; a
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Oct 01 2008
EXTENSIONS
Name clarified by Amiram Eldar, Mar 12 2020
STATUS
approved