All composite numbers can be expressed as unique products of prime numbers. This is accomplished by dividing the original number and its factors by prime numbers until all the factors are prime. A factor tree can help you visualize this.
Example: 210
210 Divide by two.
105,2 Divide by three.
35,3,2 Divide by five.
7,5,3,2 Stop. All the factors are prime.
2 x 3 x 5 x 7 = 210
That's the prime factorization of 210.
Prime numbers don't have factor trees. So if you can create a tree, your number's composite.
If the prime factorization contains a 5 and a 7, 35 is a factor.
295 is composite - 5 x 59.
A factor can or cannot be a prime number Ex: 2 is the factor of all other even numbers its a prime number but 9 is a factor of 18 and its not a prime number A prime is a factor but a factor being a prime number varies
That's a prime factor.
what number is not a prime factor
13 is a prime number. The only prime factor of a prime number is the number itself.
A composite factor is a factor that is a composite number, as opposed to a prime factor which is a factor that is a prime number.
By looking at its factor patterns.
A prime number has only one prime factor, and that prime factor is the number itself.
2 is a prime number because its only factors are one and itself. Since 2 is a prime number, if it is a factor of your number, it is a prime factor.
No prime number only has one factor. Each prime number has itself and 1 as factors. Now, the number 1 of course has only one factor, but it is technically not a prime number.