I'm having a few problems with these questions.

Determine all the twin primes p and q=p+2 for which pq-2 is also prime.

For n>1, show that every prime divisor of n!+1 is an odd integer that is greater than n

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- October 25th 2009, 07:20 PMMichaelGProofs with prime numbers.
I'm having a few problems with these questions.

Determine all the twin primes p and q=p+2 for which pq-2 is also prime.

For n>1, show that every prime divisor of n!+1 is an odd integer that is greater than n - October 25th 2009, 08:14 PMtonio