To determine if 519 is a prime number or a composite number, we simply look at the factors for 519.
If the factors of 519 are only 519 and 1, then we know that 519 is a prime number. Otherwise, 519 is a composite number.
To explain better, if 519 is only divisible by 1 and 519, then it is a prime number, and if 519 is divisible by more than 519 and 1, then it is a composite number.
The factors of 519 are as follows:
1, 3, 173, 519
Therefore, since 519 is divisible by more than one and itself, the answer to the
question "Is 519 prime or composite?" is highlighted in blue below.
composite
Is 520 prime or composite?
OK. Now you know that 519 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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