Largest prime number ever discovered!
It has 23,249,425 digits
How Ancient Greek mathematician Eratosthenes calculated the Earth’s circumference (VIDEO)
The idea that Earth is a sphere was first introduced by another ancient Greek mathematician, Pythagoras, around 500 BC and validated by Aristotle about 200 years later
Porn star turned lecturer earns students’ respect
Ruggero Freddi has three degrees: “I know my subject and feel no embarrassment”