A supercomputer at Manchester University recently had its 1 millionth processor added. The Spiking Neural Network Architecture which is more commonly known as "SpiNNaker" is a supercomputer which was built and designed to operate like the human brain. The system is capable of completing over 200 million million operations per second allowing it to model more biological neurons than any other machine on the planet. Even with a million processors the machine is still nowhere near being able to model a full human brain, the most complex simulation it has performed an 80,000 neuron model of a segment of the cortex, the outer layer of the brain that receives and processes information from the senses.
For more information on the system check out the article published by the university.