Q: Is 256,580 a Prime Number?
A: No, 256,580 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 256580 can be evenly divided by 1 2 4 5 10 20 12,829 25,658 51,316 64,145 128,290 and 256,580, with no remainder.
Since 256,580 cannot be divided by just 1 and 256,580, it is not a prime number.