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Old 2015-04-01, 23:29   #1
henryzz
Just call me Henry
 
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"David"
Sep 2007
Cambridge (GMT/BST)

585310 Posts
Default Factorial puzzle

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?
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