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A106068 Primes p such that 3p + 4 and 4p + 3 are primes. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 2 20:25 EST 2021. Contains 349445 sequences. (Running on oeis4.)