Prime Number

A prime number is a positive integer that has exactly one positive integer divisor other than 1 (i.e., no factors other than 1 and itself). Prime numbers are often simply called primes.

Prime number is an elementary-school-level concept. It is listed in the California State Standards for Grade 4.

Prerequisites

Divisor:

An integer that divides a given integer with no remainder. A synonym for factor.

Classroom Articles on Pre-Algebra (Up to Elementary-School Level)

	Associative	Integer
	Cartesian Coordinates	Line
	Commutative	Power
	Decimal Expansion	Prime Factor
	Distributive	Prime Factorization
	Equal	Quotient
	Fraction	Right Angle
	Function Graph	Rounding