To determine if 623 is a prime number or a composite number, we simply look at the factors for 623.
If the factors of 623 are only 623 and 1, then we know that 623 is a prime number. Otherwise, 623 is a composite number.
To explain better, if 623 is only divisible by 1 and 623, then it is a prime number, and if 623 is divisible by more than 623 and 1, then it is a composite number.
The factors of 623 are as follows:
1, 7, 89, 623
Therefore, since 623 is divisible by more than one and itself, the answer to the
question "Is 623 prime or composite?" is highlighted in blue below.
composite
Is 624 prime or composite?
OK. Now you know that 623 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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