# 4294967295

This number is a composite.

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).

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell