You'll Love This Stuff The Amazing Math Inside the Rubik’s Cube How to Paint a Room Using Math So instead of 101, consider 000101. That value is prime, and the zeros are just there for show ...

These numbers, which are only divisible by 1 and themselves, form the atoms of number theory, so to speak, and have fascinated humankind for thousands of years.

The first few primes are: 2, 3, 5, 7, 11, 13 … Every positive number can be expressed in just one way as a product of prime numbers. For instance, 60 is made up of two 2s, one 3, and one 5.