To determine if 2420 is a prime number or a composite number, we simply look at the factors for 2420.
If the factors of 2420 are only 2420 and 1, then we know that 2420 is a prime number. Otherwise, 2420 is a composite number.
To explain better, if 2420 is only divisible by 1 and 2420, then it is a prime number, and if 2420 is divisible by more than 2420 and 1, then it is a composite number.
The factors of 2420 are as follows:
1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420
Therefore, since 2420 is divisible by more than one and itself, the answer to the
question "Is 2420 prime or composite?" is highlighted in blue below.
composite
Is 2421 prime or composite?
OK. Now you know that 2420 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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