Coprimality involving Factorials

Number Theory Level pending

True or False?

\quad The two numbers n ! + 1 n! + 1 and ( n + 1 ) ! + 1 (n+1)! + 1 are coprime for all positive integers n n .

Notation: ! ! is the factorial notation. For example, 8 ! = 1 × 2 × 3 × × 8 8! = 1\times2\times3\times\cdots\times8 .

True False

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