To determine if 657 is a prime number or a composite number, we simply look at the factors for 657.
If the factors of 657 are only 657 and 1, then we know that 657 is a prime number. Otherwise, 657 is a composite number.
To explain better, if 657 is only divisible by 1 and 657, then it is a prime number, and if 657 is divisible by more than 657 and 1, then it is a composite number.
The factors of 657 are as follows:
1, 3, 9, 73, 219, 657
Therefore, since 657 is divisible by more than one and itself, the answer to the
question "Is 657 prime or composite?" is highlighted in blue below.
composite
Is 658 prime or composite?
OK. Now you know that 657 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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