A244087 - OEIS

A244087

Numbers n such that 4*n+3 and 8*n+7 are prime.

0, 2, 5, 20, 32, 44, 47, 59, 62, 89, 104, 107, 110, 122, 164, 170, 179, 185, 227, 254, 257, 275, 305, 359, 362, 374, 377, 389, 395, 452, 482, 500, 509, 515, 584, 587, 599, 614, 635, 674, 704, 725, 734, 740, 755, 824, 839, 872, 884, 905, 944, 950, 962, 965, 977

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OFFSET

1,2

COMMENTS

-2 is a primitive root mod (8*n+7).

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[0, 1500], PrimeQ[4 # + 3]&&PrimeQ[8 # + 7] &]

PROG

(Magma) [n: n in [0..1000] | IsPrime(4*n+3) and IsPrime(8*n+7)];

CROSSREFS