19 is the only prime which is equal to the difference of two cubes of primes.
Prove the above statement.
The difference of cubes is only prime if one of the factors is 1.
p^2+pq+q^2 > 1 for any primes
p-q=1 only for p=3, q=2 as they are the only primes that differ by 1.
Posted by Jer
on 2015-03-31 11:59:48