D-Wave's hardware is customised for a particular function: http://physicsworld.com/cws/article/news/2014/jun/20/is-d-wave-quantum-computer-actually-a-quantum-co

D-Wave's hardware is customised for a particular function: http://physicsworld.com/cws/article/news/2014/jun/20/is-d-wave-quantum-computer-actually-a-quantum-computer http://physicsworld.com/cws/article/news/2014/jun/20/is-d-wa... A team at UCSB built a prototype quantum computer that successfully factored 15 a few years back: http://www.nature.com/nphys/journal/v8/n10/full/nphys2385.html http://www.nature.com/nphys/journal/v8/n10/full/nphys2385.ht...