Prime number permutable

In Mathematical, a prime number permutable is a Prime number, which, in a given base, can have its figures reversed in any possible permutation and be still called a prime number. In bases 10, the first small numbers first permutable are (with the permutations listed between brackets)

2, 3, 5, 7, 11, 13 (31), 17 (71), 37 (73), 79 (97), 113 (131, 311), 199 (919, 991), 337 (373, 733)

All uniform Nombre first can automatically be supposed a prime number permutable. In base 2, only the uniform numbers of U1 class can be prime numbers permutable, because all 0 permuted in the place of the units give an even number; unless we regarded 1 as a prime number and 10 permutable with 01. Generalization can be made with safety for any numbering system based on an even number (such as the decimal system and hexadecimal), the prime numbers permutable can only have figures which are individually odd, any even figure permuted in the place of the units will give a divisible number by two.

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