To determine if 864 is a prime number or a composite number, we simply look at the factors for 864.
If the factors of 864 are only 864 and 1, then we know that 864 is a prime number. Otherwise, 864 is a composite number.
To explain better, if 864 is only divisible by 1 and 864, then it is a prime number, and if 864 is divisible by more than 864 and 1, then it is a composite number.
The factors of 864 are as follows:
1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 72, 96, 108, 144, 216, 288, 432, 864
Therefore, since 864 is divisible by more than one and itself, the answer to the
question "Is 864 prime or composite?" is highlighted in blue below.
composite
Is 865 prime or composite?
OK. Now you know that 864 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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