nCr % prime power

Revision en1, by Mid0, 2015-08-17 00:05:17

i'm trying to calculate nCr mod prime power , i found this comment which is really helpful but the formula as i understand doesn't apply to some numbers and i don't know how it works , could anyone explain it in more details ?

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en1 English Mid0 2015-08-17 00:05:17 302 Initial revision (published)