Google said it has built a computer that's reached "quantum supremacy," performing a computation in 200 seconds that would take the fastest supercomputers about 10,000 years. The results of Google's tests, which were conducted using a quantum chip it developed in-house, were published Wednesday in the scientific journal Nature. "This achievement is the result of years of research and the dedication of many people," Google engineering director Hartmut Neven said in a blog post. "It's also the beginning of a new journey: figuring out how to put this technology to work. We're working with the research community and have open-sourced tools to enable others to work alongside us to identify new applications."