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A106088 Primes p such that 7*p + 6 and 6*p + 7 are primes. 0

%I

%S 5,11,31,61,71,109,199,229,241,269,281,379,389,419,431,499,541,571,

%T 631,641,709,739,809,1049,1061,1069,1091,1231,1259,1289,1291,1429,

%U 1439,1451,1489,1499,1571,1601,1621,1831,1861,1931,1949,2011,2069,2089,2099,2239

%N Primes p such that 7*p + 6 and 6*p + 7 are primes.

%t Select[Prime[Range[220]], PrimeQ[6#+7]&&PrimeQ[7#+6]&]

%o (MAGMA) [p: p in PrimesUpTo(10000)| IsPrime(7*p+6) and IsPrime(6*p+7)]; // _Vincenzo Librandi_, Nov 13 2010

%K nonn

%O 1,1

%A _Zak Seidov_, May 07 2005

%E More terms from _Vincenzo Librandi_, Apr 01 2010

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Last modified October 27 21:54 EDT 2021. Contains 348290 sequences. (Running on oeis4.)