How long does it takes for an egg to go bad??

Hi all, my four eggs has dents that had not go away even whit the increased humidity. The eggs have also some stains that I very sure are going to turn into nice and colorful fungi and bacterial colonies. If the eggs are bad from the begining, how long does it generally takes to go, without a doubt bad?? Thanks for your time!!

If they are BAD, they can go down in a couple of weeks.

If they are still viable, but are in a bad environment, it could take a month or more to slowly perish.

Thanks a lot Lady!!, that is what i need to know ...

what Heather said. Thanks, Lady;)