Power of two

A power of two is a number of the form 2n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent.

Visualization of powers of two from 1 to 1024 (20 to 210)

In a context where only integers are considered, n is restricted to non-negative values,[1] so we have 1, 2, and 2 multiplied by itself a certain number of times.[2]

Because two is the base of the binary numeral system, powers of two are common in computer science. Written in binary, a power of two always has the form 100...000 or 0.00...001, just like a power of 10 in the decimal system.