Q: Is 263,561 a Prime Number?
A: Yes, 263,561 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 263561 can be evenly divided by 1 and 263,561, with no remainder.
Since 263,561 can be divided by just 1 and 263,561, it is a prime number.