A106068 Primes p such that 3p + 4 and 4p + 3 are primes.

5, 11, 19, 31, 41, 59, 89, 109, 151, 179, 181, 229, 241, 331, 349, 389, 439, 509, 521, 599, 661, 719, 769, 839, 881, 929, 1019, 1039, 1129, 1229, 1291, 1409, 1451, 1481, 1549, 1669, 1741, 1759, 1801, 1811, 2111, 2131, 2539, 2621, 2671, 2699, 2819, 2879

Offset

1,1

Comments

Prime terms in A124855.

Links

Marius A. Burtea, Table of n, a(n) for n = 1..534

Mathematica

Select[Prime[Range[450]], PrimeQ[4#+3]&&PrimeQ[3#+4]&]

Prog

(Magma) [p: p in PrimesUpTo(5000)|IsPrime(3*p+4) and IsPrime(4*p+3)] // Vincenzo Librandi, Jan 30 2011
(PARI) isok(p) = isprime(p) && isprime(3*p+4) && isprime(4*p+3); \\ Michel Marcus, Oct 12 2018

Crossrefs

Cf. A034936, A095278, A124855.

Sequence in context: A253936 A191032 A003147 * A304875 A164566 A075322

Adjacent sequences: A106065 A106066 A106067 * A106069 A106070 A106071

Keyword

nonn

Author

Zak Seidov, May 07 2005

Extensions

Extended by Ray Chandler, Mar 14 2007

Status

approved