It is called a composite number
If a number cannot be factored it is a prime number.
composite >_>
composite
All composite numbers can be expressed as unique products of prime numbers. This is known as a prime factorization.
because one number is being factored by the other number. and the numbers in a multiplication problem are just called factors anyway. hope this helped you.
It is still called a polynomial.
-5 Is Not A Valid Number.
No. It can be factored as 13*47.
Yes.
Every nonzero whole number can be factored.
composite
When a number can only be factored by 1 and itself or cannot be factored at all it is considered prime.