To determine if 2120 is a prime number or a composite number, we simply look at the factors for 2120.
If the factors of 2120 are only 2120 and 1, then we know that 2120 is a prime number. Otherwise, 2120 is a composite number.
To explain better, if 2120 is only divisible by 1 and 2120, then it is a prime number, and if 2120 is divisible by more than 2120 and 1, then it is a composite number.
The factors of 2120 are as follows:
1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120
Therefore, since 2120 is divisible by more than one and itself, the answer to the
question "Is 2120 prime or composite?" is highlighted in blue below.
composite
Is 2121 prime or composite?
OK. Now you know that 2120 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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