To determine if 403 is a prime number or a composite number, we simply look at the factors for 403.
If the factors of 403 are only 403 and 1, then we know that 403 is a prime number. Otherwise, 403 is a composite number.
To explain better, if 403 is only divisible by 1 and 403, then it is a prime number, and if 403 is divisible by more than 403 and 1, then it is a composite number.
The factors of 403 are as follows:
1, 13, 31, 403
Therefore, since 403 is divisible by more than one and itself, the answer to the
question "Is 403 prime or composite?" is highlighted in blue below.
composite
Is 404 prime or composite?
OK. Now you know that 403 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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