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Primes p such that 6p+11 is not a prime.
2

%I #17 Sep 08 2022 08:45:13

%S 11,19,29,53,59,61,67,71,79,89,103,109,113,137,139,149,151,163,179,

%T 191,193,199,223,229,239,241,251,263,269,277,293,307,337,347,349,359,

%U 373,379,389,409,419,421,431,439,443,449,467,479,487,499,503,509,523,547,557,569

%N Primes p such that 6p+11 is not a prime.

%C Primes of the form A059324(.)-1. - _R. J. Mathar_, Jan 30 2011

%H Harvey P. Dale, <a href="/A094517/b094517.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[150]],CompositeQ[6#+11]&] (* _Harvey P. Dale_, Aug 02 2021 *)

%o (Magma) [p: p in PrimesUpTo(5000)|not IsPrime(6*p+11)]; // _Vincenzo Librandi_, Jan 30 2011

%Y Complement in primes of A089438.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, following a suggestion by _R. K. Guy_, Jun 05 2004