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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
OFFSET
1,1
COMMENTS
Prime terms in A124855.
LINKS
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
KEYWORD
nonn
AUTHOR
Zak Seidov, May 07 2005
EXTENSIONS
Extended by Ray Chandler, Mar 14 2007
STATUS
approved