Hi!
To identify whether a number is prime or composite, just list all of its factors.
Let me show you what I mean by this.
A prime number has only 2 factors: 1 and itself.
A composite number has 3 or more factors.
EXAMPLE:
PRIMES: 2, 3, 5, 7,11, 13, 17, 19...
COMPOSITES: 4, 6, 8, 10, 12, 13, 14, ...
Hope it helps you! Please mark Brainliest:)