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

1,1

Comments

Original idea from G. L. Honaker, Jr.

Links

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

Example

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

Prog

(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

Crossrefs

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

Sequence in context: A071119 A157869 A046705 * A075048 A281021 A230046

Adjacent sequences: A054215 A054216 A054217 * A054219 A054220 A054221

Keyword

nonn,base

Author

Patrick De Geest, Feb 15 2000

Extensions

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

Status

approved