4 is a factor of 36, but it is not a Prime number.
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A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 4 is not prime.
2 is a factor of 72. (36*2)
36 is a composite number because it has more than two factors whereas prime numbers have only two factors.
The prime numbers also the factors of 36 is...............THREE & TWO
Composite. Factors: 1, 36, 2, 18, 9, 4, 6
You can be 36: 3*3*2*2 You can be 32: 2*2*2*2*2 You can be 30: 5*3*2