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%I #6 Sep 08 2022 08:46:04
%S 2,5,11,13,17,19,29,37,41,43,53,59,61,67,71,73,79,83,97,101,103,107,
%T 109,113,131,137,139,149,151,157,163,173,179,181,191,193,197,199,211,
%U 227,229,239,241,251,257,269,271,277,281,283,293,307,311,313,317,331,337
%N Primes which do not divide any Mersenne number M(p) = 2^p - 1 with prime p.
%H Arkadiusz Wesolowski, <a href="/A218582/b218582.txt">Table of n, a(n) for n = 1..10000</a>
%t Select[Prime@Range[68], ! PrimeQ@MultiplicativeOrder[2, #] &]
%o (Magma) [p: p in PrimesInInterval(2, 337) | not IsPrime(Modorder(2, p))]
%Y Complement in primes of A122094. Subsequence of A138837.
%K nonn
%O 1,1
%A _Arkadiusz Wesolowski_, Nov 03 2012
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