The world’s top supercomputers, by the numbers:

Summit, built by IBM, secured its top position performing at 122.3 petaflops, but it could theoretically reach 200 petaflops. That means it can perform 200,000 trillion calculations each second, analyzing data to find solutions in energy, AI and human health, among other issues.

China’s most powerful system, the Sunway TaihuLight, was ranked #2 after two years at the top of the list.

China has the most computers on the list — at 206 computers.