Wim Klein

Willem Klein (4 December 1912 – 1 August 1986), also known as Wim Klein or under his stage names Pascal and Willy Wortel, was a Dutch mathematician, famous for his ability to very quickly carry out very complicated calculations in his head. On 27 August 1976, he calculated the 73rd root of a 500-digit number in 2 minutes and 43 seconds.

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Centenary of the birth of Wim Klein, CERN's first computer

Before electronic computers were widely available at CERN, a Dutchman called Willem "Wim" Klein performed astonishing feats of mental arithmetic

04 December, 2012