WK
Source-basedRising
Willem Klein
Dutch mental calculator (1912–1986)
- Fame46.2
- Momentum9.2
- Wikipedia456
Lived 1912–1986, aged 74
AcademicsAcademic
Summary
Updated 2026-06-22
Willem Klein, also known as Wim Klein or under his stage names Pascal and Willy Wortel, was a Dutch mental calculator, famous for ability to perform very complicated calculations in his head very fast. On 27 August 1976, he calculated the 73rd root of a 500-digit number in 2 minutes and 43 seconds. This feat was recorded by the Guinness Book of Records.
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The six component signals behind the Fame score, and their ranks across the leaderboards.
Fame
Rising46.2
Composite of search demand, mentions, audience & graph footprint.
Score components
Momentum9.2
Historical9.1
Source confidence55.0
Completeness45.0
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Sources
- Клейн, ВиллемLow confidencewikipedia · ru.wikipedia.org
- ويليم كلاينLow confidencewikipedia · ar.wikipedia.org
- فيليم كلاينLow confidencewikipedia · arz.wikipedia.org
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