X-Nico

2 unusual facts about Willem Klein


Alexis Lemaire

On 10 May 2002, he calculated the 13th root of a 100-digit number in 13.55 seconds, beating the record held by Willem Klein (88.8 seconds) and the somewhat less official record of Gert Mittring (39 seconds).

Willis Dysart

In this respect Dysart is unique among the documented calculators, among whom several–most notably Dutchman Wim Klein–multiplied large numbers by breaking them up into groups of two-digit numbers but never three-digit numbers.



see also