To determine if 1020 is a prime number or a composite number, we simply look at the factors for 1020.
If the factors of 1020 are only 1020 and 1, then we know that 1020 is a prime number. Otherwise, 1020 is a composite number.
To explain better, if 1020 is only divisible by 1 and 1020, then it is a prime number, and if 1020 is divisible by more than 1020 and 1, then it is a composite number.
The factors of 1020 are as follows:
1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020
Therefore, since 1020 is divisible by more than one and itself, the answer to the
question "Is 1020 prime or composite?" is highlighted in blue below.
composite
Is 1021 prime or composite?
OK. Now you know that 1020 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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