A German computer scientist has broken the world record in mental calculation, needing just 11.80 seconds to work out the 13th root of a 100-digit number, a German mathematics museum said Wednesday.

Gert Mittring, a 38-year old computer scientist, was faster working out the answer than several onlookers using calculators at an event in the western town of Giessen sponsored by the Museum of Mathematics.

A spokesman for the museum said Mittring’s time broke a record set in 1988 by Alexis Lemaire of France, who completed a similar calculation in 13.55 seconds.

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