Are Megalodon sharks bigger than dinosaurs?

I am assuming that "Carcairadon" refers to Carcharodon, as there is no such thing as Carcairadon.

Megalodon and Carcharodon cannot be compared, largely because: a) Megalodon is a species of shark. Carcharodon is a genus of shark. A genus refers to a group of similar species.

b) The Carcharodon genus contains just two species, Carcharodon carcharias (The Great White Shark) and Carcharodon megalodon, which is of course Megalodon.

As for size, The Great White Shark can reach 6 metres (about 20 feet in length). Megalodon's size is disputed, but is generally thought to be at least 15 metres (50 feet).