Why are there solutions visible in the ‘results’ tab that don’t pass all of the test cases? Shouldn’t they be passed in order to really have a solution?
It may also be that the puzzle has been changed after people have completed it.
For example, Deigan, dodiaa and fmatray fail the last test case of this puzzle:
If I remember correctly, testcases were added, after the puzzle was already validated as a community puzzle. So these solutions passed all the old testcases. Divide the factorial has the same problem.