OK, but some random performance tests (including a bunch of 0s and 1s) could still be added -- see ruby/python.
JS integers have a maximum precision of 2^52, so I'm afraid you might have to nuke the JS version or not care about it ;-)
As the ranking cannot be changed (4 kyu) I turned it into a performance kata. Ruby & python are done, but need some help with JS. @Voile?
Also updated description to be more clear
Added performance tests to ruby and python, js is still lacking.
Added this (plus some other perfomance tests) to all languages: many (most?) of the existing solutions were wiped out...
Just replace his reference solution with one from the solution page that actually works.
Negative numbers are not tested.
The largest palindrome comes from 15*125 = 1875 -> 8.
Just added a test case similar to that mentioned by you.
Just added test cases similar to those mentioned by you (Ruby version pending fixes).
Edit: Now ok.
@GiacomoSorbi I've added six more test cases in all the languages. However, the current Ruby solution won't pass two of the new test cases so I've commented them out. Would you please help fix them?
The kata description has stated that "palindromic number made from the product of any amount of AT LEAST 2 numeric arguments". No issue now.