11111...11111 (46-digits)

This number is a composite.

111111 1111111111 1111111111 1111111111 1111111111

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The smallest repunit number with length 2*n whose a prime factor has length n, (case n=23). [Loungrides]

Submitted: 2010-10-11 05:15:13; Last Modified: 2018-10-18 13:56:04.