A prime number is any positive integer greater than zero that has only two proper divisorsA proper divisor is a number n that when divided into another number . (The prime factor of 8 is
)
Prime numbers are fundamental to mathematics, as all whole numbers can be constructed from them; anything that can be shown to be true about prime numbers is therefore true for all numbers.[2]
Notes
^a | One is not a prime number because it has only one proper divisor, itself. |