To determine if 3123 is a prime number or a composite number, we simply look at the factors for 3123.
If the factors of 3123 are only 3123 and 1, then we know that 3123 is a prime number. Otherwise, 3123 is a composite number.
To explain better, if 3123 is only divisible by 1 and 3123, then it is a prime number, and if 3123 is divisible by more than 3123 and 1, then it is a composite number.
The factors of 3123 are as follows:
1, 3, 9, 347, 1041, 3123
Therefore, since 3123 is divisible by more than one and itself, the answer to the
question "Is 3123 prime or composite?" is highlighted in blue below.
composite
Is 3124 prime or composite?
OK. Now you know that 3123 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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