Fermat

Mssr. Fermat -- what have uou done?
Your simple conjecture has everyone
Churning out proofs,
Which are nothing but goofs!
Could it be that your statement's an erudite spoof?
A marginal hoax
That you've played on us folks?
But then you're really not known for your practical jokes.
Or is it then true
That you knew what to do
When n was an integer greater than two?
Oh then why can't we find
That same proof...are we blind?
You must be reproved, for I'm losing my mind.

by Jonathan P. Dowling
Mathematics Magazine 1986