To determine if 7785 is a prime number or a composite number, we simply look at the factors for 7785.
If the factors of 7785 are only 7785 and 1, then we know that 7785 is a prime number. Otherwise, 7785 is a composite number.
To explain better, if 7785 is only divisible by 1 and 7785, then it is a prime number, and if 7785 is divisible by more than 7785 and 1, then it is a composite number.
The factors of 7785 are as follows:
1, 3, 5, 9, 15, 45, 173, 519, 865, 1557, 2595, 7785
Therefore, since 7785 is divisible by more than one and itself, the answer to the
question "Is 7785 prime or composite?" is highlighted in blue below.
composite
Is 7786 prime or composite?
OK. Now you know that 7785 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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