A054218 Palindromic primes of the form 'primemirp' resulting from A054217.

2, 3, 5, 7, 131, 313, 373, 797, 11311, 17971, 18181, 19991, 35353, 72727, 78787, 90709, 93739, 96769, 98389, 1153511, 1193911, 1201021, 1409041, 1583851, 1597951, 1657561, 1831381, 1879781, 3083803, 3089803, 3319133, 3343433, 3391933, 3541453, 3643463

Offset: 1

Author

Patrick De Geest, Feb 15 2000

Keywords

• nonn
• base

Comments

Original idea from G. L. Honaker, Jr.

Examples

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

Links

• Peter Rowlett, Table of n, a(n) for n = 1..8668

Crossrefs

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

Programs

Python

from sympy import isprime
for i in range(2,10**7):
    if isprime(i):
        emirp = int(str(i)[-1::-1])
        if isprime(emirp):
            primemirp = int(str(i)+str(emirp)[1:])
            if isprime(primemirp):
                print(primemirp)
# Peter Rowlett, Nov 16 2023

Extensions

a(33)-a(35) from Peter Rowlett, Nov 16 2023