... then is prime only if , i.e. . The primes of the type are known as 'Mersenne primes'...
Merry Christmas from Italy
Hi, this is my first time posting.
The problem was to prove that the only prime of the form (n^5)-1 is 31.
My plan is to first write that there is another prime of that form and then somehow prove that that prime is the same prime in the above problem, 31.
But I'm not sure how to get there, some help please?