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A359978 Prime numbers whose decimal representation can be split into two nonempty parts without leading 0, say x and y (in that order), and such that the concatenation of y and x yields a different prime number.

%I A359978 #9 Jan 22 2023 16:02:57
%S A359978 13,17,31,37,71,73,79,97,113,127,131,149,157,163,173,181,191,197,199,
%T A359978 271,277,311,313,317,331,337,359,367,373,379,397,419,479,491,571,577,
%U A359978 593,617,631,673,719,727,733,739,757,761,787,797,811,839,877,911,919,937
%N A359978 Prime numbers whose decimal representation can be split into two nonempty parts without leading 0, say x and y (in that order), and such that the concatenation of y and x yields a different prime number.
%H A359978 Rémy Sigrist, <a href="/A359978/a359978.gp.txt">PARI program</a>
%e A359978 The first terms, alongside the corresponding other prime numbers, are:
%e A359978   n   a(n)  Other prime numbers
%e A359978   --  ----  -------------------
%e A359978    1    13  {31}
%e A359978    2    17  {71}
%e A359978    3    31  {13}
%e A359978    4    37  {73}
%e A359978    5    71  {17}
%e A359978    6    73  {37}
%e A359978    7    79  {97}
%e A359978    8    97  {79}
%e A359978    9   113  {131, 311}
%e A359978   10   127  {271}
%e A359978   11   131  {113, 311}
%e A359978   12   149  {491}
%o A359978 (PARI) See Links section.
%Y A359978 Cf. A061461, A225035, A246944.
%K A359978 nonn,base
%O A359978 1,1
%A A359978 _Rémy Sigrist_, Jan 20 2023