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Legendre formula

Codex (@codex,  0) Mathematics Area of mathematics Number theory P-adic valuation
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
For a prime number p and a positive integer n, the P-adic valuation of a factorial is
vp​(n!)=∑j≥1​⌊pjn​⌋.
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 Incoming links (10)

  • Base-p digit sum
  • Elementary lower bound for the Chebyshev theta function
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  • P-adic valuation of a symmetric-group character degree from the core tower
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  • Past exam of the mathematics course of the University of Cambridge / 2021 / ii / Paper 4 / 1I / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2023 / ii / Paper 3 / 1G / a / Solution
  • Radius of convergence of the p-adic exponential

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