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A023354 Primes that remain prime through 5 iterations of function f(x) = 9x + 8. 1

%I #23 Sep 08 2022 08:44:47

%S 4099,8117,9587,36899,73061,75527,214771,240197,350219,385709,453199,

%T 483649,501029,556607,575119,616991,701497,724597,880067,961069,

%U 1230311,1342501,1376197,1558811,1566847,1613707,2450779,2483711,2536379,2598157

%N Primes that remain prime through 5 iterations of function f(x) = 9x + 8.

%C Primes p such that 9*p+8, 81*p+80, 729*p+728, 6561*p+6560 and 59049*p+59048 are also primes. - _Vincenzo Librandi_, Aug 05 2010

%H John Cerkan, <a href="/A023354/b023354.txt">Table of n, a(n) for n = 1..10000</a>

%o (Magma) [n: n in [1..19000000] | IsPrime(n) and IsPrime(9*n+8) and IsPrime(81*n+80) and IsPrime(729*n+728) and IsPrime(6561*n+6560) and IsPrime(59049*n+59048)] // _Vincenzo Librandi_, Aug 05 2010

%Y Subsequence of A023235, A023267, A023298, and A023326.

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified May 9 03:17 EDT 2024. Contains 372341 sequences. (Running on oeis4.)