**In base twelve, and in base eight, "15" is a prime, and so is its 'reversal' "51".**

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There are many more prime pairs such as 15 and 51 (base eight or twelve) in an odd-number base than in an even-number base: in an even-number base any prime beginning with an even digit cannot be a prime when it is reversed.**

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Here (for example) is a list of some primes in base eleven which have prime reversals:
(T stands for ten in base eleven)**

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