HELP!!!!! I have two eggs that have pipped on the very base, like where they are touching the floor of the bator. Is that bad?
Nope. Not bad! It will be just fine. The little pip just allows oxygen to enter the air space in the egg, allowing for the chick to adjust its lungs to breathing air for a little while. Whether it is on the base doesn't matter. Once they get enough energy, they will start unzipping as Cynthia mentioned.
If a chick pips in the middle or bottom of the egg (opposite of the air sac), you should watch those more carefully... If they pipped in or near the air sac section of the egg, this means they first had an internal pip where they breathed in the air in the little sac. Once that air is all used up, the carbon dioxide causes their muscles to spasm. This allows them to puncture the egg and start breathing normal air!
So, to make a short answer long... no, don't be worried.