Q: Is 511,255 a Prime Number?
A: No, 511,255 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 511255 can be evenly divided by 1 5 102,251 and 511,255, with no remainder.
Since 511,255 cannot be divided by just 1 and 511,255, it is not a prime number.