MYP Maths, Prime and composite numbers
A prime number is a natural number greater than 1 which has exactly two factors, 1 and itself.
A composite number is a natural number greater than 1 which has more than two factors.
You must know that the number 1 is neither prime nor composite.
Also the Fundamental theorem of arithmetic states that Every composite number can be written as a product of prime factors in one and only one way.
To find the prime factors of a composite number we systematically divide the number by the prime numbers which are its factors, starting with the smallest.
So for your question 80/2=40
10/2=5 which is prime
Thus the prime factorization of 80=2*2*2*2*5