To determine if 1604 is a prime number or a composite number, we simply look at the factors for 1604.
If the factors of 1604 are only 1604 and 1, then we know that 1604 is a prime number. Otherwise, 1604 is a composite number.
To explain better, if 1604 is only divisible by 1 and 1604, then it is a prime number, and if 1604 is divisible by more than 1604 and 1, then it is a composite number.
The factors of 1604 are as follows:
1, 2, 4, 401, 802, 1604
Therefore, since 1604 is divisible by more than one and itself, the answer to the
question "Is 1604 prime or composite?" is highlighted in blue below.
composite
Is 1605 prime or composite?
OK. Now you know that 1604 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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