To determine if 7781 is a prime number or a composite number, we simply look at the factors for 7781.
If the factors of 7781 are only 7781 and 1, then we know that 7781 is a prime number. Otherwise, 7781 is a composite number.
To explain better, if 7781 is only divisible by 1 and 7781, then it is a prime number, and if 7781 is divisible by more than 7781 and 1, then it is a composite number.
The factors of 7781 are as follows:
1, 31, 251, 7781
Therefore, since 7781 is divisible by more than one and itself, the answer to the
question "Is 7781 prime or composite?" is highlighted in blue below.
composite
Is 7782 prime or composite?
OK. Now you know that 7781 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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