Hyper operator

Hyper operators are extensions to the binary operations of addition, multiplication, and exponentiation. Multiplication is repeated addition, and exponentiation is repeated multiplication, so it is natural to extend them further &mdash; repeated exponentiation is called "tetration," for instance. When used on the positive integers, each hyper operator grows much faster than the previous one; since the numbers generated become very large, hyper operators are considered to be googological.