To determine if 3125 is a prime number or a composite number, we simply look at the factors for 3125.
If the factors of 3125 are only 3125 and 1, then we know that 3125 is a prime number. Otherwise, 3125 is a composite number.
To explain better, if 3125 is only divisible by 1 and 3125, then it is a prime number, and if 3125 is divisible by more than 3125 and 1, then it is a composite number.
The factors of 3125 are as follows:
1, 5, 25, 125, 625, 3125
Therefore, since 3125 is divisible by more than one and itself, the answer to the
question "Is 3125 prime or composite?" is highlighted in blue below.
composite
Is 3126 prime or composite?
OK. Now you know that 3125 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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