Q: Is 343,999 a Prime Number?
A: No, 343,999 is 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 343999 can be evenly divided by 1 419 821 and 343,999, with no remainder.
Since 343,999 cannot be divided by just 1 and 343,999, it is not a prime number.