Q: Is 278,001 a Prime Number?

A: No, 278,001 is not a prime number.

Why is 278,001 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 278001 can be evenly divided by 1 3 9 17 23 51 69 79 153 207 237 391 711 1,173 1,343 1,817 3,519 4,029 5,451 12,087 16,353 30,889 92,667 and 278,001, with no remainder.

Since 278,001 cannot be divided by just 1 and 278,001, it is not a prime number.

Number	277,999	278,000	278,002	278,003
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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