Posts tagged: number theory

So, bored in a math talk Ulam starts writing integers in a spiral and circling primes. He soon notices something weird:

If you have a prime number $p$ (other than two and five) then the last digit of $p$ is 1, 3, 7, or 9. If for some reason we believe that prime numbers are randomly distributed (after all, the last...

I just read a book called "Fermat's last theorem" by Simon Singh, and I think it was awesome. I actually listened to the audio version of it. The book does not assume any prior knowledge of...