To determine if 3720 is a prime number or a composite number, we simply look at the factors for 3720.
If the factors of 3720 are only 3720 and 1, then we know that 3720 is a prime number. Otherwise, 3720 is a composite number.
To explain better, if 3720 is only divisible by 1 and 3720, then it is a prime number, and if 3720 is divisible by more than 3720 and 1, then it is a composite number.
The factors of 3720 are as follows:
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 60, 62, 93, 120, 124, 155, 186, 248, 310, 372, 465, 620, 744, 930, 1240, 1860, 3720
Therefore, since 3720 is divisible by more than one and itself, the answer to the
question "Is 3720 prime or composite?" is highlighted in blue below.
composite
Is 3721 prime or composite?
OK. Now you know that 3720 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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