What is the most powerful TM?

The term "most powerful TM" can vary depending on context, but in the realm of Pokémon, many consider TM (Technical Machine) moves like "Hyper Beam" or "Earthquake" to be among the most powerful due to their high damage output and versatility in battles. In a broader context, if referring to Turing machines (TM) in computer science, the "most powerful" would refer to a theoretical model that can perform any computation given enough time and resources, which is essentially the standard Turing machine itself.