n= positive integer
n! + 1 → is this a prime number?
n! - 1 → is this a prime number?
what’s the method to find out?
No obvious way for large n.
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n= positive integer
n! + 1 → is this a prime number?
n! - 1 → is this a prime number?
what’s the method to find out?
No obvious way for large n.