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  2. Chudnovsky algorithm - Wikipedia

    en.wikipedia.org/wiki/Chudnovsky_algorithm

    The Chudnovsky algorithm is a fast method for calculating the digits of π, based on Ramanujan's π formulae.Published by the Chudnovsky brothers in 1988, [1] it was used to calculate π to a billion decimal places.

  3. 121 (number) - Wikipedia

    en.wikipedia.org/wiki/121_(number)

    In decimal, it is a Smith number since its digits add up to the same value as its factorization (which uses the same digits) and as a consequence of that it is a Friedman number (). But it cannot be expressed as the sum of any other number plus that number's digits, making 121 a self number .

  4. Mathematical fallacy - Wikipedia

    en.wikipedia.org/wiki/Mathematical_fallacy

    In mathematics, certain kinds of mistaken proof are often exhibited, and sometimes collected, as illustrations of a concept called mathematical fallacy.There is a distinction between a simple mistake and a mathematical fallacy in a proof, in that a mistake in a proof leads to an invalid proof while in the best-known examples of mathematical fallacies there is some element of concealment or ...

  5. Bailey–Borwein–Plouffe formula - Wikipedia

    en.wikipedia.org/wiki/Bailey–Borwein–Plouffe...

    This does not compute the nth decimal digit of π (i.e., in base 10). [2] But another formula discovered by Plouffe in 2022 allows extracting the nth digit of π in decimal. [3] BBP and BBP-inspired algorithms have been used in projects such as PiHex [4] for calculating many digits of π using distributed computing. The existence of this ...

  6. Approximations of π - Wikipedia

    en.wikipedia.org/wiki/Approximations_of_π

    In 1996, Simon Plouffe derived an algorithm to extract the n th decimal digit of π (using base 10 math to extract a base 10 digit), and which can do so with an improved speed of O(n 3 (log n) 3) time.

  7. Logarithm - Wikipedia

    en.wikipedia.org/wiki/Logarithm

    In mathematics, the logarithm of a number is the exponent by which another fixed value, the base, must be raised to produce that number.For example, the logarithm of 1000 to base 10 is 3, because 1000 is 10 to the 3 rd power: 1000 = 10 3 = 10 × 10 × 10.

  8. Math Blaster Mystery: The Great Brain Robbery - Wikipedia

    en.wikipedia.org/wiki/Math_Blaster_Mystery:_The...

    Math Blaster Mystery: The Great Brain Robbery is a product in a line of educational products created by Davidson & Associates that takes place in a different universe from the original Math Blaster. It has no relation to Davidson's earlier Apple II game Math Blaster Mystery. The game was released in North America, Sweden and Spain.

  9. Supergolden ratio - Wikipedia

    en.wikipedia.org/wiki/Supergolden_ratio

    In mathematics, the supergolden ratio is a geometrical proportion close to 85/58. Its true value is the real solution of the equation x 3 = x 2 + 1. The name supergolden ratio results from analogy with the golden ratio, the positive solution of the equation x 2 = x + 1. A triangle with side lengths ψ, 1, and 1 ∕ ψ has an angle of exactly ...