I had the same problem. I was getting NumberFormatExceptions because I was trying to parse an integer that was greater than the integer max value. My advice to anyone with this issue: Try refactoring your code to use strings instead of integers where possible (any more of a hint would spoil the answer.)

Idk why but the example "59544965313" crashes my program on code wars but when I test it in my main it works perfectly fine, someone?

Thank you, my bad i should have seen the tests down there.

Don't include main function in your code. The tests call your function is_valid_ip and check the value it returns.

Oh, I'm using C.
It's what I said, when i try to test or attempt the tests are always a "Log". Then even if the answear is 1 or 0 it's always wrong.

Please say which language you're using and give more concrete elements, it's hard to help otherwise. You should read this: https://docs.codewars.com/training/troubleshooting/

So when I try to attempt or test it appear that log is a valid option i guess, idk waht this means.

And they are right.

I am getting the same error they are saying -5 is not a prime .

thank you , im stupid, i have been confused all day for this xD

a prime number (or a prime) is a natural number greater than 1...

No, it isn't.

So, this is saying that my code is wrong because -5 ins't a prie number, but it is or am I dumb?