“It’s a very impressive machine,” Mr. Dongarra said. “It’s a lot more powerful than the other computers.”

The latest ranking of the top 500 computers, to be released Monday, is determined by running a standard mathematical equation. The winning computer was able to make 8.2 quadrillion calculations per second, or in more technical terms, 8.2 petaflops per second.

The performance of K is equivalent to linking around one million desktop computers, Mr. Dongarra said.