Q: Is 261,508 a Prime Number?
A: No, 261,508 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 261508 can be evenly divided by 1 2 4 13 26 47 52 94 107 188 214 428 611 1,222 1,391 2,444 2,782 5,029 5,564 10,058 20,116 65,377 130,754 and 261,508, with no remainder.
Since 261,508 cannot be divided by just 1 and 261,508, it is not a prime number.