From Adrian Covert … The Supercomputer That Houses an Entire Universe:
Over a span of two weeks in October, the Mira supercomputer will crank away nonstop, processing quadrillions of operations every second—something that few other machines are currently capable of. It will simultaneously track trillions of particles as they move, expand, and react to each other according to the laws of physics. This simulation will have to use everything mankind has learned about the movement of objects. If successful, it will not only confirm what we've suspected, but will also give us a deeper understanding of how the cosmos came to be. Mira, in short, is simulating the history of our universe.