Conjectured no. of terms | Infinite |
---|---|
First terms | 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 199 |
Largest known term | (108177207-1)/9 |
OEIS index |
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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,[1] but later they were also called absolute primes.[2]