Prime numbers don't factorize; they're already prime.
23 x 3 x 5 = 120
It's more efficient. You want to end up with all prime numbers. You could divide by a composite number, but you'd just have to break that number down later. It saves steps.
You can use prime numbers to factorize numbers, a very useful tool
No. For example: 4181 / 37 = 113 so it can't be prime. But 4181 is the first composite number in the Fibonacci sequence with a prime index. ;)
23 x 32
35 = 243
As a product of its prime factors: 23*3*5 = 120
1, 2, 11, 22 2 and 11 are prime.
23 x 3 x 5 = 120
break it into prime number multiples,10 = 2 * 5 (both prime numbers)example: factorize 387(387) = 9 * 43 (both primes , end of excercise)factorize 390:(390) = 2 * (195) = 3 * (65) = 5 * 13 (both primes , end of excercise)
It is: 24*112 = 1936
If you play the factor game, you factorize the number. If the number of factors are only 2 including 1 and number itself, then it is a prime.
48 = 24 x 3
15 = 31*51
3 times 5
5^2
The prime factors of 100 are: 2 * 2 * 5 * 5