Mk. 24's have a much smaller warhead and are the same size and weight as a Mk. 27. That's what the planes carried.
A beast that large will be resistant to bomb strikes. Just look at the pounding that the Bismarck took from multiple warships... even at point blank range. The crew eventually scuttled her - unless you ask a Brit
. However, some well-placed explosions under the keel (not into it) is a different story.