Q: Is 81,003 a Prime Number?

A: No, 81,003 is not a prime number.

Why is 81,003 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 81003 can be evenly divided by 1 3 13 31 39 67 93 201 403 871 1,209 2,077 2,613 6,231 27,001 and 81,003, with no remainder.

Since 81,003 cannot be divided by just 1 and 81,003, it is not a prime number.

Number	81,001	81,002	81,004	81,005
Prime?	yes	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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