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n!+1(n+1)!+1 \large n! + 1 \qquad \qquad (n+1)! + 1 n!+1(n+1)!+1
If nnn is a positive integer, find the greatest common divisor of the two numbers above.
Notation: !!! denotes the factorial notation. For example, 8!=1×2×3×⋯×88! = 1\times2\times3\times\cdots\times8 8!=1×2×3×⋯×8.
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