To determine if 865 is a prime number or a composite number, we simply look at the factors for 865.
If the factors of 865 are only 865 and 1, then we know that 865 is a prime number. Otherwise, 865 is a composite number.
To explain better, if 865 is only divisible by 1 and 865, then it is a prime number, and if 865 is divisible by more than 865 and 1, then it is a composite number.
The factors of 865 are as follows:
1, 5, 173, 865
Therefore, since 865 is divisible by more than one and itself, the answer to the
question "Is 865 prime or composite?" is highlighted in blue below.
composite
Is 866 prime or composite?
OK. Now you know that 865 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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