To determine if 851 is a prime number or a composite number, we simply look at the factors for 851.
If the factors of 851 are only 851 and 1, then we know that 851 is a prime number. Otherwise, 851 is a composite number.
To explain better, if 851 is only divisible by 1 and 851, then it is a prime number, and if 851 is divisible by more than 851 and 1, then it is a composite number.
The factors of 851 are as follows:
1, 23, 37, 851
Therefore, since 851 is divisible by more than one and itself, the answer to the
question "Is 851 prime or composite?" is highlighted in blue below.
composite
Is 852 prime or composite?
OK. Now you know that 851 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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