Q: Is 111,643 a Prime Number?

A: No, 111,643 is not a prime number.

Why is 111,643 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 111643 can be evenly divided by 1 7 41 287 389 2,723 15,949 and 111,643, with no remainder.

Since 111,643 cannot be divided by just 1 and 111,643, it is not a prime number.

Number	111,641	111,642	111,644	111,645
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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