This number is a composite.

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222 is the smallest repdigit such that the product of itself and all truncations of itself plus and minus one results in twin primes. I.e., 222*22*2 ± 1 are twin primes. [Opao]

Submitted: 2003-12-14 23:51:37;   Last Modified: 2018-02-05 11:01:25.
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