Permutable prime

A permutable prime, also known as anagrammatic prime, is a prime number which, in a given base, can have its digits' positions switched through any permutation and still be a prime number. H. E. Richert, who is supposedly the first to study these primes, called them permutable primes, but later they were also called absolute primes.

Permutable prime
Conjectured no. of termsInfinite
First terms2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 199
Largest known term(108177207-1)/9
OEIS index
  • A258706
  • Absolute primes: every permutation of digits is a prime (only the smallest representatives of the permutation classes are shown)
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