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Kummer's theorem : ウィキペディア英語版 | Kummer's theorem In mathematics, Kummer's theorem on binomial coeffients gives the highest power of a prime number ''p'' dividing a binomial coefficient. In particular, it asserts that given integers ''n'' ≥ ''m'' ≥ 0 and a prime number ''p'', the maximum integer ''k'' such that ''p''''k'' divides the binomial coefficient is equal to the number of carries when ''m'' is added to ''n'' − ''m'' in base ''p''. The theorem is named after Ernst Kummer, who proved it in the paper . It can be proved by writing as and using Legendre's formula. ==See also==
* Lucas's theorem on binomial coefficients
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