For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

Lots of things come in an order, like things that happen during your day or the pages in a book. But what order should you say your numbers and how can you tell which number is bigger or smaller?

In 1886 the mathematician Leopold Kronecker famously said, “God Himself made the whole numbers — everything else is the work of men.” Indeed, mathematicians have introduced new sets of numbers besides ...