Sorry to bring up my very old thread. I want to double check about the egg testing. Today I was about to make some hard boiled eggs for a sandwich to take with me tomorrow. I had just two eggs left in the fridge, with the BB date of 24th april. That's almost 4 weeks old. I dunked them in a large bowl filled with water. Thing is, neither of them floated which you might expect after 4 weeks, but, the broad end was pointing completely upwards on one of them, and the other was almost completely broad end upwards. They were both making some contact with the bottom of the bowl though. Would they still have been good to cook? I've thrown them.