I would candle them first. Carefully. If there is dark stuff that sloshes around in there, carefully throw it as far away as you can. Then if there is a chance that they are fertile, you can see if they started developing. If you plan to eat them, I would candle again a few days later to look for blood rings from any in the early stages of development. Eggs for my personal use aren't always refrigerated, and I have had them sitting on a counter for over a week at times. I wash them right before use and do a float test while I am at it.