## Are there infinitely many semi primes of the form x2+2xx^2 + 2x for integral xx?

My professor showed the class 1000 dollars and said he’d give it to whoever could prove it… Obviously he’s not serious but in having a tough time wrestling with this problem. Answer It is likely that no one in the class will collect. Since x2+2x=x(x+2), for x>2 we have x2+2x is semiprime if and only … Read more