Answer: Prime
Step-by-step explanation: To determine if 13 is a prime or composite number, first find the factors of 13.
To find the factors of 13, begin by dividing 13 by 1 which gives us 13. This means that 1 and 13 are factors.
Notice however that 13 isn't divisible by any other number except 13. When we divide 13 by 13, we get 1. Since 13 and 1 are repeat factors however, the only factors of 13 are 1 and 13.
Since there are only two factors, 1 and the number itself, we say that 13 is prime.