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Old 2015-04-02, 12:02   #5
ATH
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Dec 2003
Denmark

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Quote:
Originally Posted by henryzz View Post
I just noticed that 10!=6!*7!.
Are there any other instances where x!=y!*z! with y and z > 1?
If not can anyone prove this?
No other examples for y,z < 10000 except the trivial cases.
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