8888

This number is a composite.

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The only four-digit repdigit such that the sum of itself and all truncations of itself minus one, i.e., 8888+888+88+8 - 1 = 9871 is an emirp. [Bajpai]

Submitted: 2015-02-23 14:47:05;   Last Modified: 2015-02-23 15:49:43.
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