7833887

This number is a prime.

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An emirp expressible as the repdigit sum of each prime digit d (222 + 333 + 55555 + 7777777) with the summands concatenating in this order into the smallest prime with each d repeated at least d times (222333555557777777). [Beedassy]

Submitted: 2009-09-25 13:37:51;   Last Modified: 2014-08-30 10:16:45.
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