A152309 - OEIS

A152309

Primes p such that the multiplicative order of 2 modulo p is (p-1)/9.

397, 7867, 10243, 10333, 12853, 13789, 14149, 14293, 14563, 15643, 17659, 18379, 18541, 21277, 21997, 23059, 23203, 26731, 27739, 29179, 29683, 31771, 34147, 35461, 35803, 36541, 37747, 39979, 40213, 40429, 41131, 41491, 44029, 44101

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OFFSET

1,1

LINKS

Klaus Brockhaus, Table of n, a(n) for n=1..1000

PROG

(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) ];

(PARI) Vec(select(p->((p!=2) && (znorder(Mod(2, p)) == (p-1)/9)), primes(10000))) \\ Michel Marcus, Feb 09 2015

CROSSREFS

Cf. A115591, A001133, A001134, A001135, A001136.

Sequence in context: A129190 A256081 A338476 * A298124 A327592 A340419

Adjacent sequences: A152306 A152307 A152308 * A152310 A152311 A152312

KEYWORD

nonn

AUTHOR

Klaus Brockhaus, Dec 02 2008

STATUS

approved