it is a little difficult...

Unless the second argument of the assertEqual is null and it doesnt innately catch that, I don't think there's a difference.
So, in this case, definitely no.

yep, I've done it without BigInteger. My thought was the same that it couldn't be that easy to just use BigInt ... :)

CW has problems:-(

I think there might be an issues with codewars, I am getting same error.

I don't understand where your problem is: for 119989884756 the test reference solution returns "[114998988756, 8, 2]".
34 guys passed the Java kata.

Hi, balint. I checked the tests in many languages and are working well, even though the system isn't(at the present moment) as fast as it used to be.

I'm sorry but I don't have enough time:-( Did you think that the answer could sometimes be null?

I just tried it and had no problem at all. I don't know what to say. Did you test your program on your computer?

Please which language? "Unknown Test Failure" is not output by the kata but by Codewars. I'm as you are... I don't know what it means!

Good! Thanks for the feedback.

Now my solution passes well in 3500 millisecons, maybe you could try.

Maybe CW is too busy. I just tried my own solution but I get every time:

Submission timed out while communicating with our servers. This may infrequently happen if our servers are extremly busy. Please try again. If issues persist you can check status.codewars.com to see if server issues are being investigated.

Maybe later?

It means you have an error in a random test but the text you receive seems a bit incomplete. I don't know why. Do you use long?
50 guys passed the jata in Java without any problem. Could you be a bit more precise? Did you try several times?