'Mathlete' smashes human calculation record

LONDON (AFP) - The world's fastest human calculator on Tuesday broke his own record for working out a 200-digit number using nothing but brain power to produce the answer in just over 70 seconds.

Alexis Lemaire, a 27-year-old Frenchman, correctly calculated the 13th root of a random 200-digit number from a possible 393 trillion answers.

The so-called 'mathlete' produced the answer of 2,407,899,893,032,210 in 70.2 seconds, beating his previous record of 72.4 seconds, at London's Science Museum.

A computer was used to produce a random 200-digit number before he sat down to calculate the answer in his head.

The museum's curator of mathematics, Jane Wess, said: "He sat down and it was all very quiet -- and all of a sudden he amazingly just cracked it.

"I believe that it is the highest sum calculated mentally.

"He seems to have a large memory and he's made this his life's ambition. It's quite remarkable to see it happen. A very small number of people have this extraordinary ability; nowadays there is only a handful."

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