To determine if 1320 is a prime number or a composite number, we simply look at the factors for 1320.
If the factors of 1320 are only 1320 and 1, then we know that 1320 is a prime number. Otherwise, 1320 is a composite number.
To explain better, if 1320 is only divisible by 1 and 1320, then it is a prime number, and if 1320 is divisible by more than 1320 and 1, then it is a composite number.
The factors of 1320 are as follows:
1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 110, 120, 132, 165, 220, 264, 330, 440, 660, 1320
Therefore, since 1320 is divisible by more than one and itself, the answer to the
question "Is 1320 prime or composite?" is highlighted in blue below.
composite
Is 1321 prime or composite?
OK. Now you know that 1320 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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