The four smallest prime numbers are 2, 3, 5 and 7. Next comes 11, which is quite a “jump” from 7. What law is at work here? Mathematicians have been racking their brains since ancient times.

A prime number is a special number that can only be divided by one and itself. It makes them a pain for this fella who likes to divide things into neat, equal piles ...

A prime number has exactly two factors, itself and one. The first ten prime numbers are \({2}\), \({3}\), \({5}\), \({7}\), \({11}\), \({13}\), \({17}\), \({19 ...