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→<big><math>\pi</math></big> in mathematics: there should be more:series, approx. etc pp.
In 1873, Abraham Shanks spent twenty years calculating <big><math>\pi</math></big> to 707 places, but made a mistake in his calculation and only 527 of them were correct. When electronic computers were developed, <big><math>\pi</math></big> was soon calculated to tens of thousands, millions, and billions of places. As of 2002, the record is held by Yasumasa Kanada of Tokyo University at 1,241,100,000,000 digits.{{fact}} That result was never printed out.
In 1873, Abraham Shanks spent twenty years calculating <big><math>\pi</math></big> to 707 places, but made a mistake in his calculation and only 527 of them were correct. When electronic computers were developed, <big><math>\pi</math></big> was soon calculated to tens of thousands, millions, and billions of places. As of 2002, the record is held by Yasumasa Kanada of Tokyo University at 1,241,100,000,000 digits.{{fact}} That result was never printed out.
==<big><math>\pi</math></big> in mathematics==
It's impossible to overestimate the importance of <big><math>\pi</math></big> (and [[e]]) for mathematics. Both values are intrinsically tied, e.g. by [[Euler's identity]]
<math> e^{\pi \imath} +1 = 0</math>.
==Recreation==
==Recreation==