Wiles was older than 40 when he corrected the proof, and thus not eligible for the fields medal, but he did receive a silver IMU for his achievement.

Fermat’s last theorem isn’t important to many people, it’s more like he was a bit if a celebrity in the math world for his mathematical ability and playfulness.

Penicillin? No one remembers those guys except doctors.

Fermat? Most mathematicians can recount countless tales of his life, and he is well known even amoung the arts side of academia.

And yet, penicillin had a much larger effect on the world.