To determine if 171 is a prime number or a composite number, we simply look at the factors for 171.
If the factors of 171 are only 171 and 1, then we know that 171 is a prime number. Otherwise, 171 is a composite number.
To explain better, if 171 is only divisible by 1 and 171, then it is a prime number, and if 171 is divisible by more than 171 and 1, then it is a composite number.
The factors of 171 are as follows:
1, 3, 9, 19, 57, 171
Therefore, since 171 is divisible by more than one and itself, the answer to the
question "Is 171 prime or composite?" is highlighted in blue below.
composite
Is 172 prime or composite?
OK. Now you know that 171 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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