To determine if 8120 is a prime number or a composite number, we simply look at the factors for 8120.
If the factors of 8120 are only 8120 and 1, then we know that 8120 is a prime number. Otherwise, 8120 is a composite number.
To explain better, if 8120 is only divisible by 1 and 8120, then it is a prime number, and if 8120 is divisible by more than 8120 and 1, then it is a composite number.
The factors of 8120 are as follows:
1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 116, 140, 145, 203, 232, 280, 290, 406, 580, 812, 1015, 1160, 1624, 2030, 4060, 8120
Therefore, since 8120 is divisible by more than one and itself, the answer to the
question "Is 8120 prime or composite?" is highlighted in blue below.
composite
Is 8121 prime or composite?
OK. Now you know that 8120 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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