It's a goner then, sorry. The float trst is horrible. Just to test it I put a15 day quitter in who I knew was definitely dead in a dish with water, and it wighked a whole bunch too! I opened it up - rotten. I habe zero faith in that test, I'll never do it again. Its super unreliable at best, youd have better luck reaching into a hat and pulling out dead or alive cards than float testing. I'm not trying to be mean, just I don't trust the float test. I would open it up. I do think it could, I would make a small hole when you open it and let out the pressure, then open it up. I have had some eggs die very early, they usually never explode.