4294967295
This number is a composite.
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The largest odd number of sides for which a regular polygon can be constructed with compass and straightedge. This construction is possible only if the number is a product of distinct Fermat primes (3, 5, 17, 257 or 65537).
Submitted: 2003-11-16 11:56:00; Last Modified: 2009-03-04 19:00:45.
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