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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 11:41:19;   Last Modified: 2015-02-25 14:41:54.

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