Pierre de Fermat

Hello! My name is Pierre de Fermat. I was born in a town called Beaumont-de-Lomagne in France, way back around the year 1607. While most people in my town knew me as a lawyer and a judge, my greatest passion was something I did just for fun: solving number puzzles! To me, numbers were like a secret code, and I loved spending my free time finding their hidden patterns and secrets. I didn't need a fancy laboratory or special tools for my hobby; all I ever needed was my own mind, a piece of paper, and a good book to read.

My main job was very serious. In 1631, I became a councillor at the Parlement of Toulouse, which is a formal way of saying I was a judge. It was important work where I helped people and made sure the laws were fair for everyone. But when I came home after a long day, I would relax with my favorite hobby—mathematics. I wasn't a professional mathematician who taught at a university or wrote textbooks for a living. I studied numbers purely for the joy of it! Because of this, some people later called me the 'Prince of Amateurs.' I would spend hours reading ancient math books and thinking of new ideas and problems to solve.

One day, around the year 1637, I was reading a very old math book called Arithmetica. As I followed along with the problems, I had a wonderful idea of my own. I grabbed a pen and wrote a little note in the margin of the page. It was a puzzle related to a famous equation inside the book. In my note, I wrote that I had discovered a marvelous proof for my idea, but the margin was simply too small to contain it all. That small note became my most famous challenge to the world. Many years later, people would call it 'Fermat's Last Theorem.' I always loved leaving little puzzles like this for other curious minds to think about.

Even though math was my personal hobby, I didn't always do it alone. I loved writing letters to other thinkers and sharing our ideas. In 1654, I exchanged many letters with another brilliant man named Blaise Pascal. We wrote back and forth about games of chance, like what happens when you flip a coin or roll dice. Together, through our letters, we came up with some of the very first ideas about probability theory. That's the special kind of math that helps us figure out how likely something is to happen. It was so exciting to build these new ideas together, one letter at a time.

I lived to be about 57 years old, and my life came to an end on January 12th, 1665. Do you remember that little puzzle I scribbled in the margin of a book? It became one of the most famous unsolved problems in the entire history of mathematics! For more than 350 years, the smartest minds in the world tried to find the solution. Finally, in 1994, a mathematician named Andrew Wiles found the proof. I think it's wonderful that my little hobby, which started from a simple love of numbers, could inspire so many people for so long to explore, to question, and to never give up on a difficult problem.