Q: Is 427,999 a Prime Number?

A: No, 427,999 is not a prime number.

Why is 427,999 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 427999 can be evenly divided by 1 11 13 41 73 143 451 533 803 949 2,993 5,863 10,439 32,923 38,909 and 427,999, with no remainder.

Since 427,999 cannot be divided by just 1 and 427,999, it is not a prime number.

Number	427,997	427,998	428,000	428,001
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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