What was the longest paper that you had to write in school? I bet it comes nowhere close to the paper written by Andrew Wiles. This mathematician wrote up a proof for Fermat’s Last Theorem that took 109 pages! He presented it in 1995, made some corrections, and then found approval from his peers. The funny thing about this proof is that it pertains to a problem that Fermat had encountered in a book and then written in the margin that he could not quite fit his proof there. Unfortunately, Fermat died before giving his proof, but one does have to wonder what he was going to write. It sounds much shorter than 109 pages!