Q: Is 40,001 a Prime Number?

A: No, 40,001 is not a prime number.

Why is 40,001 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 40001 can be evenly divided by 1 13 17 181 221 2,353 3,077 and 40,001, with no remainder.

Since 40,001 cannot be divided by just 1 and 40,001, it is not a prime number.

Number	39,999	40,000	40,002	40,003
Prime?	no	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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