Prime numbers
imp-factors-multiples-and-patterns--imp-prime-and-composite-numbers--prime-numbers
Factors, multiples and patterns
Prime and composite numbers
Prime numbers are numbers that have only 2 factors: 1 and themselves. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. By contrast, numbers with more than 2 factors are call composite numbers.