11743027459

This number is a prime.

                                                                1 1743027459

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+ There are 447 prime numbers with no unique digits (i.e., each digit that it has appears at least twice) whose doubles have distinct digits. The primes 633767 and 48784117 are the smallest and largest. Note that their sum is a Cyclops prime (11743027459). [Gaydos]

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