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Repunit Rigor (Posted on 2011-10-25) Difficulty: 4 of 5
Can any base ten repunit, other than 1, be a perfect cube?

If so, give an example. Otherwise prove that no base ten repunit (other than 1) can be a perfect cube.

No Solution Yet Submitted by K Sengupta    
Rating: 3.0000 (2 votes)

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re: Wow... Is this really a D4? (spoiler--based on Google search) | Comment 3 of 5 |
(In reply to Wow... Is this really a D4? (spoiler--based on Google search) by Charlie)

In general, we prefer not to have unsolved problems on the site, but I think none of us except K knew it was unsolved.

  Posted by Gamer on 2011-10-25 15:53:42

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