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%I #9 Sep 08 2022 08:45:39
%S 397,7867,10243,10333,12853,13789,14149,14293,14563,15643,17659,18379,
%T 18541,21277,21997,23059,23203,26731,27739,29179,29683,31771,34147,
%U 35461,35803,36541,37747,39979,40213,40429,41131,41491,44029,44101
%N Primes p such that the multiplicative order of 2 modulo p is (p-1)/9.
%H Klaus Brockhaus, <a href="/A152309/b152309.txt">Table of n, a(n) for n=1..1000</a>
%o (Magma) [ p: p in PrimesUpTo(44101) | r eq 1 and Order(R!2) eq q where q,r is Quotrem(p,9) where R is ResidueClassRing(p) ];
%o (PARI) Vec(select(p->((p!=2) && (znorder(Mod(2, p)) == (p-1)/9)), primes(10000))) \\ _Michel Marcus_, Feb 09 2015
%Y Cf. A115591, A001133, A001134, A001135, A001136.
%K nonn
%O 1,1
%A _Klaus Brockhaus_, Dec 02 2008
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