Is 19 a composite or prime factor
2x2x2x2x2x5
5 x 7 = 35
Since 160 is a composite number, it would be a composite factor.
160 80,2 40,2,2 20,2,2,2 10,2,2,2,2 5,2,2,2,2,2
The prime factors of 160 are 2, 2, 2, 2, 2, and 5. The prime factors of 195 are 3, 5, and 13. The prime factors they have in common are a single 5, so 5 is the greatest common factor.
A positive integer greater than one must be either prime or composite. It cannot be neither. 2 divides 160. That is, 160 has a factor other than 1 and itself. So it is not a prime and therefore is composite.
2 x 2 x 2 x 2 x 2 x 5 = 160
160 is a composite no. and 19 is a prime no.
2 x 2 x 2 x 2 x 2 x 5
Some people find factor trees to be helpful. 75 25,3 5,5,3 160 80,2 40,2,2 20,2,2,2 10,2,2,2,2 5,2,2,2,2,2
160