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A118915 Primes p such that (p^2+5)/6 is prime. +0
7
5, 13, 19, 23, 37, 41, 89, 113, 127, 131, 139, 149, 167, 197, 229, 233, 239, 251, 271, 359, 373, 401, 433, 449, 463, 503, 523, 541, 607, 631, 643, 653, 701, 719, 743, 769, 811, 827, 877, 881, 887, 919, 967, 971, 1009, 1013, 1021, 1093, 1097, 1283, 1301 (list; graph; listen)
OFFSET

1,1

COMMENT

For all primes q>3, we have q=6k+-1 for some k, which makes it easy to show that 6 divides q^2+5.

CROSSREFS

Cf. A109953 (primes p such that (p^2+1)/3 is prime), A118918 (primes p such that (p^2+11)/12 is prime).

Sequence in context: A022138 A028274 A067463 this_sequence A084442 A023270 A103804

Adjacent sequences: A118912 A118913 A118914 this_sequence A118916 A118917 A118918

KEYWORD

nonn

AUTHOR

T. D. Noe (noe(AT)sspectra.com), May 05 2006

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.


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