To determine if 2840 is a prime number or a composite number, we simply look at the factors for 2840.
If the factors of 2840 are only 2840 and 1, then we know that 2840 is a prime number. Otherwise, 2840 is a composite number.
To explain better, if 2840 is only divisible by 1 and 2840, then it is a prime number, and if 2840 is divisible by more than 2840 and 1, then it is a composite number.
The factors of 2840 are as follows:
1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840
Therefore, since 2840 is divisible by more than one and itself, the answer to the
question "Is 2840 prime or composite?" is highlighted in blue below.
composite
Is 2841 prime or composite?
OK. Now you know that 2840 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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