The prime factor of 4 is 2.
5 is already prime.
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composite number
Its factors are: 1 2 4 19 38 and 76 Prime numbers: 2 and 19 Composite numbers: 4 38 and 76 Note: 1 is neither a prime or composite number
Yes. To be composite, the first number has at least 2 prime factors, the second number also has at least prime factors; the product of the two will have at least 4 prime factors, so it must be a composite number.
The prime factors of 100 are 2, and 5. The composite factors are 100, 50, 25, 20, 10, and 4. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.
1081 is composite because it has 4 factors: 1, 23, 47, and 1081.