This number is a prime.

                                                             4710 1299815623

+ The larger of only two primes less than a googol that can be represented as the product of a repdigit number consisting of 5's and all its truncations minus 2, i.e., 55555*5555*555*55*5-2. The other is 152623 = 555*55*5-2. [Loungrides]

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