<human>:  With regards to the famous math problem Fermat’s last theorem, when did it get solved?
<bot>: Fermat’s last theorem was not solved. It was proved that Fermat’s last theorem was undecidable. This means that it is impossible to prove that the statement is true or false. The proof is very complicated, and is based on the theory of prime numbers. The theorem is named after the French mathematician Pierre de Fermat who wrote about it in 1637.