A prime number is a natural number greater than 1 that has exactly two distinct factors, 1 and the number itself. So, if p is a prime number then its only factors will be 1 and p itself. 4: It can be ...

Here’s a number to savor: 2 43,112,609-1. Its size is mind-boggling. With nearly 13 million digits, it makes the number of atoms in the known universe seem negligible, a mere 80 digits. But its true ...

Meet the new largest known prime number. It starts with a 4, continues on for 23 million digits, then ends with a 1. As is true with all prime numbers, it can only be evenly divided by one and itself.