https://www.vice.com/en_us/article/4axgym/fastest-supercomputer-to-ever-exist-breaks-the-exascale-barrier

For the first time, a supercomputer has officially broken the exaflop ceiling and become the most powerful computer to ever exist. 

The Frontier supercomputer at Oak Ridge National Laboratory was able to demonstrate performance of more than 10^18 operations per second on a standard test called the TOP500 that ranks the 500 most powerful commercially available computer systems, according to the organization.