Q: Is 515,143 a Prime Number?
A: Yes, 515,143 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 515143 can be evenly divided by 1 and 515,143, with no remainder.
Since 515,143 can be divided by just 1 and 515,143, it is a prime number.