- primtall
- მარტივი რიცხვი
Norsk-georgisk ordbok. 2011.
primtall
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Permutable prime — A permutable prime is a prime number, which, in a given base, can have its digits switched to any possible permutation and still spell a prime number. H. E. Richert, who supposedly first studied these primes, called them permutable primesH. E.… … Wikipedia
