To determine if 1600 is a prime number or a composite number, we simply look at the factors for 1600.
If the factors of 1600 are only 1600 and 1, then we know that 1600 is a prime number. Otherwise, 1600 is a composite number.
To explain better, if 1600 is only divisible by 1 and 1600, then it is a prime number, and if 1600 is divisible by more than 1600 and 1, then it is a composite number.
The factors of 1600 are as follows:
1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600
Therefore, since 1600 is divisible by more than one and itself, the answer to the
question "Is 1600 prime or composite?" is highlighted in blue below.
composite
Is 1601 prime or composite?
OK. Now you know that 1600 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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