The number 45 is not a prime. It can be divided by 3 and 5. The number 5 is prime, and any number ending in 5 is divisible by 5 and will not be prime for that reason.
Prime
103 is a prime number.
1 is a prime number.
It is a composite number.
5x3x29
85 is composite.
21 is a composite number.
21 is a composite number.
75 is a Composite Number.
63 is a Composite Number.
180 is a Composite Number.
compostie