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A023294 Primes that remain prime through 3 iterations of function f(x) = 8x + 7. 3

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

%S 659,2549,5189,6269,7229,7949,9209,11579,16139,18089,22739,25589,

%T 26099,26339,29009,30689,40289,51719,55799,59669,60689,61379,63599,

%U 69959,70229,74609,85829,94949,95819,102539,109589,118169,121469,135599,136889

%N Primes that remain prime through 3 iterations of function f(x) = 8x + 7.

%C Primes p such that 8*p+7, 64*p+63 and 512*p+511 are also primes. - _Vincenzo Librandi_, Aug 04 2010

%H John Cerkan, <a href="/A023294/b023294.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) == 29 (mod 30). - _John Cerkan_, Sep 23 2016

%o (Magma) [n: n in [1..450000] | IsPrime(n) and IsPrime(8*n+7) and IsPrime(64*n+63) and IsPrime(512*n+511)] // _Vincenzo Librandi_, Aug 04 2010

%Y Subsequence of A023231, A023263, and A139487.

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified April 24 13:24 EDT 2024. Contains 371955 sequences. (Running on oeis4.)