Q: Is 257,908 a Prime Number?
A: No, 257,908 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 257908 can be evenly divided by 1 2 4 7 14 28 61 122 151 244 302 427 604 854 1,057 1,708 2,114 4,228 9,211 18,422 36,844 64,477 128,954 and 257,908, with no remainder.
Since 257,908 cannot be divided by just 1 and 257,908, it is not a prime number.