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 A023315 Numbers n such that n remains prime through 4 iterations of function f(x) = 5x + 6. 2

%I

%S 79,401,1259,2477,3019,4409,10303,15679,20509,24499,34127,43987,44389,

%T 53101,66359,71287,74857,81097,85903,90803,93053,102811,103231,104999,

%U 112601,125453,132533,144731,156347,157793,160817,161839,163981,170641

%N Numbers n such that n remains prime through 4 iterations of function f(x) = 5x + 6.

%C n, 5*n+6, 25*n+36, 125*n+186 and 625*n+936 are primes. - _Vincenzo Librandi_, Aug 04 2010

%H John Cerkan, <a href="/A023315/b023315.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) == 9 or 13 (mod 14). - _John Cerkan_, Oct 07 2016

%o (MAGMA) [n: n in [1..1000000] | IsPrime(n) and IsPrime(5*n+6) and IsPrime(25*n+36) and IsPrime(125*n+186) and IsPrime(625*n+936)] // _Vincenzo Librandi_, Aug 04 2010

%Y Subsequence of A023219, A023254, A023285, and A081759.

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified September 18 17:02 EDT 2020. Contains 337170 sequences. (Running on oeis4.)