To determine if 3900 is a prime number or a composite number, we simply look at the factors for 3900.
If the factors of 3900 are only 3900 and 1, then we know that 3900 is a prime number. Otherwise, 3900 is a composite number.
To explain better, if 3900 is only divisible by 1 and 3900, then it is a prime number, and if 3900 is divisible by more than 3900 and 1, then it is a composite number.
The factors of 3900 are as follows:
1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 25, 26, 30, 39, 50, 52, 60, 65, 75, 78, 100, 130, 150, 156, 195, 260, 300, 325, 390, 650, 780, 975, 1300, 1950, 3900
Therefore, since 3900 is divisible by more than one and itself, the answer to the
question "Is 3900 prime or composite?" is highlighted in blue below.
composite
Is 3901 prime or composite?
OK. Now you know that 3900 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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