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EulerSpoiler's user avatar
EulerSpoiler's user avatar
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EulerSpoiler
  • Member for 5 years, 11 months
  • Last seen more than a month ago
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About

An even number is perfect if, and only if, its cototient is equal to the square of the largest power of 2 contained in it.

I also have the username Hexagon Tiling.

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