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A023295 Primes that remain prime through 3 iterations of function f(x) = 8x + 9. 2

%I #18 Sep 08 2022 08:44:47

%S 23,643,2293,5023,5653,9643,10723,11503,12823,15493,18353,18773,28403,

%T 32003,32183,41953,42853,45233,49853,50873,52103,53113,54623,56123,

%U 76003,80803,84443,86783,88813,89413,92033,95213,96823,97943,100613,115793

%N Primes that remain prime through 3 iterations of function f(x) = 8x + 9.

%C Primes p such that 8*p+9, 64*p+81 and 512*p+657 are also primes. - _Vincenzo Librandi_, Aug 04 2010

%H John Cerkan, <a href="/A023295/b023295.txt">Table of n, a(n) for n = 1..10000</a>

%H a(n) == 3 (mod 10). - _John Cerkan_, Sep 24 2016

%o (Magma) [n: n in [1..450000] | IsPrime(n) and IsPrime(8*n+9) and IsPrime(64*n+81) and IsPrime(512*n+657)] // _Vincenzo Librandi_, Aug 04 2010

%Y Subsequence of A023232, A023264, and of A153762.

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)