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| Listed below are the verified claims for the record listed. |
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20 five-digit numbers (which were not prime numbers) were given to Wenzel Grüß (Germany).
He found all prime factors of them in 6:38 minutes on 24 September 2016 at the
Mental Calculation World Cup in Bielefeld, Germany.
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20 five-digit numbers (which were not prime numbers) were given to Willem Bouman (Netherlands). He found all factors
of them in 13:39 minutes on 22 December 2010 at the Delft University of Technology, Netherlands. |
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| The Book of Alternative records - World records, record breakers and more! |
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