Trial Division
A brute-force method of finding a Divisor of an Integer 
by simply plugging in one or a set ofIntegers and seeing if they Divide . Repeated application of trial division to obtain thecomplete Prime Factorization of a number is called Direct Search Factorization. An individual integer beingtested is called a Trial Divisor.
- Apoapsis
- Apocalypse Number
- Apocalyptic Number
- Apodization
- Apodization Function
- Apollonius Circles
- Apollonius Point
- Apollonius' Problem
- Apollonius Pursuit Problem
- Apollonius' Theorem
- Apothem
- Apparatus Function
- Appell Hypergeometric Function
- Appell Polynomial
- Appell Transformation
- Apple
- Approximately Equal
- Approximation Theory
- Apéry's Constant
- Arakelov Theory
- Arbelos
- Arborescence
- Arboricity
- Arc
- Arch