How to calculate (a! / b!) % mod

Revision en1, by DonMichaelCorleone, 2016-05-09 12:28:25

How to calculate (a! / b!) % mod where n is 1<=n<=20000000, m is 1<=m<=n and mod is a positive integer ?

Tags number theory, factorial, combinatorics, modular arithmetic


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en1 English DonMichaelCorleone 2016-05-09 12:28:25 137 Initial revision (published)