To determine if 661 is a prime number or a composite number, we simply look at the factors for 661.
If the factors of 661 are only 661 and 1, then we know that 661 is a prime number. Otherwise, 661 is a composite number.
To explain better, if 661 is only divisible by 1 and 661, then it is a prime number, and if 661 is divisible by more than 661 and 1, then it is a composite number.
The factors of 661 are as follows:
1, 661
Therefore, since 661 is divisible by only one and itself, the answer to the
question "Is 661 prime or composite?" is highlighted in blue below.
prime
Is 662 prime or composite?
OK. Now you know that 661 is a prime 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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