To determine if 8520 is a prime number or a composite number, we simply look at the factors for 8520.
If the factors of 8520 are only 8520 and 1, then we know that 8520 is a prime number. Otherwise, 8520 is a composite number.
To explain better, if 8520 is only divisible by 1 and 8520, then it is a prime number, and if 8520 is divisible by more than 8520 and 1, then it is a composite number.
The factors of 8520 are as follows:
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 71, 120, 142, 213, 284, 355, 426, 568, 710, 852, 1065, 1420, 1704, 2130, 2840, 4260, 8520
Therefore, since 8520 is divisible by more than one and itself, the answer to the
question "Is 8520 prime or composite?" is highlighted in blue below.
composite
Is 8521 prime or composite?
OK. Now you know that 8520 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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