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  2. Factorial - Wikipedia

    en.wikipedia.org/wiki/Factorial

    It can be extended to the non-integer points in the rest of the complex plane by solving for Euler ... 9!! = 1 × 3 × 5 × 7 × 9 = 945. Double factorials are used ...

  3. Stirling's approximation - Wikipedia

    en.wikipedia.org/wiki/Stirling's_approximation

    Comparison of Stirling's approximation with the factorial. In mathematics, Stirling's approximation (or Stirling's formula) is an asymptotic approximation for factorials. It is a good approximation, leading to accurate results even for small values of .

  4. Double factorial - Wikipedia

    en.wikipedia.org/wiki/Double_factorial

    The term odd factorial is sometimes used for the double factorial of an odd number. [5] [6] The term semifactorial is also used by Knuth as a synonym of double ...

  5. Wheat and chessboard problem - Wikipedia

    en.wikipedia.org/wiki/Wheat_and_chessboard_problem

    While the number of grains on the first half of the chessboard is large, the amount on the second half is vastly (2 32 > 4 billion times) larger. The number of grains of wheat on the first half of the chessboard is 1 + 2 + 4 + 8 + ... + 2,147,483,648 , for a total of 4,294,967,295 (2 32 − 1) grains, or about 279 tonnes of wheat (assuming 65 ...

  6. Falling and rising factorials - Wikipedia

    en.wikipedia.org/wiki/Falling_and_rising_factorials

    The rising factorial (sometimes called the Pochhammer function, Pochhammer polynomial, ascending factorial, [1] ... [5] In the theory of special functions ...

  7. Euler's factorization method - Wikipedia

    en.wikipedia.org/wiki/Euler's_factorization_method

    The great disadvantage of Euler's factorization method is that it cannot be applied to factoring an integer with any prime factor of the form 4k + 3 occurring to an odd power in its prime factorization, as such a number can never be the sum of two squares.

  8. DJT stock climbs after Trump says he will not sell shares - AOL

    www.aol.com/finance/djt-stock-climbs-trump-says...

    Trump Media & Technology Group stock ()closed over 15% higher Friday and was briefly halted for volatility after Donald Trump said he would not sell his shares in the company, the home of Trump's ...

  9. Factorial number system - Wikipedia

    en.wikipedia.org/wiki/Factorial_number_system

    The term "factorial number system" is used by Knuth, [3] while the French equivalent "numération factorielle" was first used in 1888. [4] The term "factoradic", which is a portmanteau of factorial and mixed radix, appears to be of more recent date. [5]