To determine if 3120 is a prime number or a composite number, we simply look at the factors for 3120.
If the factors of 3120 are only 3120 and 1, then we know that 3120 is a prime number. Otherwise, 3120 is a composite number.
To explain better, if 3120 is only divisible by 1 and 3120, then it is a prime number, and if 3120 is divisible by more than 3120 and 1, then it is a composite number.
The factors of 3120 are as follows:
1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120
Therefore, since 3120 is divisible by more than one and itself, the answer to the
question "Is 3120 prime or composite?" is highlighted in blue below.
composite
Is 3121 prime or composite?
OK. Now you know that 3120 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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