Both belong to set of whole numbers. There are infinite prime and composite numbers.
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Oh, dude, prime numbers are like the popular kids in high school - they only hang out with themselves. Composite numbers, on the other hand, are like the rest of us, always surrounded by factors. So, the similarity is that they're both numbers... that's about it.
Well, honey, prime numbers are like the popular kids in school - they only hang out with 1 and themselves. Composite numbers, on the other hand, are like the rest of us - they can be divided by more than just 1 and their own reflection in the mirror. So, the similarity is that both prime and composite numbers are part of the big ol' family of integers, just with different social circles.
Prime numbers and composite numbers are both integers. They are both natural numbers greater than 1. The main similarity between prime and composite numbers is that they can both be divided by 1 and themselves. However, prime numbers have exactly two factors (1 and the number itself), while composite numbers have more than two factors.
The difference between prime and composite numbers is simple. Prime numbers have only two factors, 1 and itself. Composite numbers are divisible by more than two numbers
Prime numbers have two factors, composite numbers have more than two.
The product of two prime numbers will be composite.
31, 37, & 41 are prime; 32,33,34,35,36,38,39 & 40 are composite.
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else, except 1 and 0. 1 and 0 are neither prime, nor composite. So 'what is the same', is that both prime and composite numbers have 1 as a factor, and itself as a factor.