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Palindromic primes of the form 'primemirp' resulting from A054217.
3

%I #21 Nov 23 2023 07:58:07

%S 2,3,5,7,131,313,373,797,11311,17971,18181,19991,35353,72727,78787,

%T 90709,93739,96769,98389,1153511,1193911,1201021,1409041,1583851,

%U 1597951,1657561,1831381,1879781,3083803,3089803,3319133,3343433,3391933,3541453,3643463

%N Palindromic primes of the form 'primemirp' resulting from A054217.

%C Original idea from _G. L. Honaker, Jr._

%H Peter Rowlett, <a href="/A054218/b054218.txt">Table of n, a(n) for n = 1..8668</a>

%e Prime 113 has emirp 311 and 11311 is a palindromic prime.

%o (Python)

%o from sympy import isprime

%o for i in range(2,10**7):

%o if isprime(i):

%o emirp = int(str(i)[-1::-1])

%o if isprime(emirp):

%o primemirp = int(str(i)+str(emirp)[1:])

%o if isprime(primemirp):

%o print(primemirp)

%o # _Peter Rowlett_, Nov 16 2023

%Y Cf. A054217, A000040, A006567, A048054, A002385.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Feb 15 2000

%E a(33)-a(35) from _Peter Rowlett_, Nov 16 2023