Is 128 prime or composite?

To determine if 128 is a prime number or a composite number, we simply look at the factors for 128.

If the factors of 128 are only 128 and 1, then we know that 128 is a prime number. Otherwise, 128 is a composite number.

To explain better, if 128 is only divisible by 1 and 128, then it is a prime number, and if 128 is divisible by more than 128 and 1, then it is a composite number.

The factors of 128 are as follows:

1, 2, 4, 8, 16, 32, 64, 128

Therefore, since 128 is divisible by more than one and itself, the answer to the question "Is 128 prime or composite?" is highlighted in blue below.


Is 129 prime or composite?
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