To determine if 7805 is a prime number or a composite number, we simply look at the factors for 7805.
If the factors of 7805 are only 7805 and 1, then we know that 7805 is a prime number. Otherwise, 7805 is a composite number.
To explain better, if 7805 is only divisible by 1 and 7805, then it is a prime number, and if 7805 is divisible by more than 7805 and 1, then it is a composite number.
The factors of 7805 are as follows:
1, 5, 7, 35, 223, 1115, 1561, 7805
Therefore, since 7805 is divisible by more than one and itself, the answer to the
question "Is 7805 prime or composite?" is highlighted in blue below.
composite
Is 7806 prime or composite?
OK. Now you know that 7805 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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