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A188131 Primes p == 1 (mod 4) such that 6p+1 is prime. 2

%I #14 Nov 14 2019 04:44:58

%S 5,13,17,37,61,73,101,137,173,181,233,241,257,277,293,313,373,397,461,

%T 557,577,593,601,641,653,661,761,773,797,853,937,941,1013,1033,1061,

%U 1117,1193,1201,1321,1361,1381,1433,1453,1481,1553,1613,1693,1733,1777,1873,1973,1993

%N Primes p == 1 (mod 4) such that 6p+1 is prime.

%C Contains A188130 as a subsequence.

%H Amiram Eldar, <a href="/A188131/b188131.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[Range[1, 2000, 4], PrimeQ[#] && PrimeQ[6# + 1] &] (* _Amiram Eldar_, Nov 13 2019 *)

%o (PARI) forprime(p=1,1e5, p%4==1 & isprime(p*6+1) & print1(p", "))

%Y Cf. A188130.

%K nonn

%O 1,1

%A _M. F. Hasler_, Mar 21 2011

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Last modified April 19 17:39 EDT 2024. Contains 371797 sequences. (Running on oeis4.)