Laurent Lellouch of France's Center for Theoretical Physics led a team from France, Germany and Hungary in the research, which involved some of the world's strongest supercomputers, the German newspaper Deutsche Welle said Friday.

Einstein's e=mc2 formula shows that mass can be converted into energy and vice versa.

France's National Center for Scientific Research said the computations the scientists worked out involved envisioning space and time as part of a four-dimensional crystal lattice, the newspaper said.