(KRON) -- A supercomputer housed at the Lawrence Livermore National Laboratory (LLNL) in Livermore has officially been crowned as the world's fastest. The computer, known as "El Capitan," is a collaboration between LLNL, the National Nuclear Security Administration (NNSA) and Hewlett Packard Enterprises (HPE). El Capitan is an exascale system dedicated to national security. Exascale computing systems, according to the U.S. Department of Energy, feature more powerful hardware than the previous generation of supercomputers and are able to process information much faster. Atmospheric river, heavy rain may hit Bay Area this week El Capitan's processing speed has been verified as 1.742 exaFLOPs -- 1.742 quintillion calculations per second -- on the High Performance Linpack, according to LLNL. The High Performance Linpack is the standard benchmark used to evaluate supercomputing. An exaFLOP is used to measure the performance for a supercomputer that can calculate at least a quintillion calculations per second. A quintillion, for perspective, is represented by a one followed by 18 zeroes. El Capitan is the fastest computer ever benchmarked, according to the Top 500 List. El Capitan, which is about the size of two tennis courts side-by-side, is used to maintain the U.S. stockpile of nuclear weapons.