Da Vinci's Last Deathtrap

"I have devised a cunning and inescapable deathtrap. Unfortunately, this room is too small to contain it."

Source: This is the punchline from yesterday's Irregular Webcomic. Say what you want about internet comics, but there's no way you're finding a good number theory joke in Family Circus or Shoe.


Explanation: For those of you who do not remember (and shame on you if you don't) I first mentioned Fermat's last theorem nine days ago. You can read about it under the explanation for item "2".