To determine if 217 is a prime number or a composite number, we simply look at the factors for 217.
If the factors of 217 are only 217 and 1, then we know that 217 is a prime number. Otherwise, 217 is a composite number.
To explain better, if 217 is only divisible by 1 and 217, then it is a prime number, and if 217 is divisible by more than 217 and 1, then it is a composite number.
The factors of 217 are as follows:
1, 7, 31, 217
Therefore, since 217 is divisible by more than one and itself, the answer to the
question "Is 217 prime or composite?" is highlighted in blue below.
composite
Is 218 prime or composite?
OK. Now you know that 217 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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