Original: A divisor of  that is not 1, &minus;1, , or  (which are trivial divisors) is known as a non-trivial divisor; numbers with non-trivial divisors are known as composite numbers, while prime numbers have no non-trivial divisors.
Simplified: A divisor of n that is not 1, &minus;1, n or &minus;n is known as a non-trivial divisor; numbers with non-trivial divisors are known as composite numbers, while prime numbers have no non-trivial divisors.