Phil, I donʼt subscribe or care much for Jim Macanny's views, however he gets 10 points for his Book and DVD on calculating primes........I recommend this to anyone interested in math...Yes he has a winner and Yes he will be richer for it...his method is valid and does solve for all prime numbers and itʼs factors........He did a excellent work in taking much of number theory on primes and applying them all to produce a coherent and reliable way of calculating any number of primes and all factorization of any prime number ................ ..they say the man who invented sliced bread did not invent slicing nor did he invent bread he only demonstrated the use of the two together.................wow! It really works . ....Maybe he's a "one hit wonder" i guess...:)