A185104 - OEIS

A185104

Primes with property that each swapping any pair of digits also gives a prime.

11, 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 179, 199, 311, 337, 373, 733, 919, 991, 3911

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Conjecture: next terms are 1111111111111111111 and 11111111111111111111111.

LINKS

EXAMPLE

Prime 179 is a term because 197 and 719 are also prime.

Prime 1913 is not a term because 9113 is not prime (even though 1193, 1319, 1931 and 3911 are primes).

CROSSREFS

Cf. A003459 (absolute primes).

Subsequence of A069706 (primes with property that swapping first and last digits also gives a prime).

KEYWORD

nonn,base,less

AUTHOR

STATUS

approved