Q: Is 171,999 a Prime Number?

A: No, 171,999 is not a prime number.

Why is 171,999 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 171999 can be evenly divided by 1 3 9 29 87 261 659 1,977 5,931 19,111 57,333 and 171,999, with no remainder.

Since 171,999 cannot be divided by just 1 and 171,999, it is not a prime number.

Number	171,997	171,998	172,000	172,001
Prime?	no	no	no	yes

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

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