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Old 2020-10-21, 18:48   #3
1976 Toyota Corona years forever!
petrw1's Avatar
Nov 2006
Saskatchewan, Canada

2×32×11×23 Posts

Originally Posted by Viliam Furik View Post
The whole process is here.

If we say the 7 factorial is x, then we can generalize it for x, and by shifting things around, we find that expression of the form (√√x + √√x) * √(√x + (√x)/x) is a whole number whenever x+1 is a square.
Thanks a big deal, but you dropped he 2x on line 2 of your napkin.

So If I knew what I was doing I could reverse this process and get other whole numbers starting with √(x!+1) ??
x can be 4, 5, or 7.

Last fiddled with by petrw1 on 2020-10-21 at 18:54
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