2187
This number is a composite.
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The prime to prime power 3^7 was proved by Peter Hegarty,
Desmond MacHale to be the smallest order of a non-trivial
odd order group which occurs as the full automorphism group
of a finite group. [Post]
Submitted: 2009-05-09 06:23:44; Last Modified: 2009-05-09 15:34:03.
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