%I #11 Oct 30 2023 11:14:12
%S 23,29,83,89,211,223,227,239,257,263,277,281,283,727,787,811,821,823,
%T 839,857,863,877,883,887,1201,1229,1231,1277,1279,1283,1321,1381,1423,
%U 1427,1429,1483,1487,1489,1523,1583,1723,1783,1801,1823,1831,1877,1879
%N Primes that become a different prime under the mapping 2 <=> 8.
%H Robert Price, <a href="/A180538/b180538.txt">Table of n, a(n) for n = 1..4005</a>
%H <a href="/index/Pri#primes">Index to Primes</a>, Primes that become a different prime under some mapping.
%t fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 2] || MemberQ[id, 8]) && PrimeQ[ FromDigits[ id /. {2 -> 8, 8 -> 2}] ]]; Select[ Prime@ Range@ 300, fQ]
%Y Cf. A171043, A175791, A180517 thru A180559, A175789, A180560, A180561.
%K base,nonn
%O 1,1
%A _Zak Seidov_ and _Robert G. Wilson v_, Sep 09 2010