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A243458 Primes p such that (p reversed)-3 is also a prime. 2

%I #5 Sep 08 2022 08:46:08

%S 5,23,29,41,43,47,61,67,211,227,229,239,241,251,263,277,281,283,293,

%T 401,419,431,433,449,457,467,479,491,499,601,613,647,653,659,661,673,

%U 677,683,691,2003,2029,2053,2111,2113,2129,2137,2141,2161,2203,2207,2213,2239

%N Primes p such that (p reversed)-3 is also a prime.

%H Vincenzo Librandi, <a href="/A243458/b243458.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[2, 3000]], PrimeQ[FromDigits[Reverse[IntegerDigits[#]]] - 3]&]

%o (Magma) [p: p in PrimesInInterval(2, 3000) | IsPrime(q-3) where q is Seqint(Reverse(Intseq(p)))];

%Y Cf. similar sequences listed in A243457.

%K nonn,base

%O 1,1

%A _Vincenzo Librandi_, Jun 05 2014

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Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)