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are we able to decide the following questions (1) are there more or less primes with p=n!−1 than with p=n!+1? (2) are there n≠3 with n!−1 and n!+1 both are prime? (3.1) are there n≠4, 5, 7 with √(n!+1)∈N? (3.2) are there n>2 with √(n!−1)∈N? (4.1) if ((n!+1)/(n+1))∈N∧n>1 ⇒ n=2k∧k∈N? (4.2) is there an n>2 with ((n!−1)/(n−1))∈N?
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