From discovery.com: Bacteria-Run Computer Solves Math Puzzle.

A new living computer, bred from E. coli bacteria instead of stamped from silica, has for the first time successfully solved a classic mathematical puzzle known as the Burnt Pancake Problem.

While this bacteria-based computer is more proof of concept than practical, a living computer might one day solve complex mathematical problems faster than silicon supercomputers.

"The computing potential of DNA far exceeds that of any other material," said Karmella Haynes, a researcher at Davidson University and lead study author. "If we figure out how to increase that capacity in a practical manner we will have much more computing power." [continue]