666666666
This number is a composite.
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The only nine-digit repdigit such that the difference of all truncations of itself from itself plus
one, i.e., 666666666-66666666-6666666-666666-66666-6666-666-66-6 + 1 = 592592599, is prime. [Bajpai]
Submitted: 2015-02-24 17:41:19; Last Modified: 2015-02-25 20:41:54.
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