Rudiger Gamm, a mathematical prodigy able to find the quotient of two primes to sixty decimal places, was described as 'a human miracle' by one magazine.  But Gamm devoted his life to maths from an early age, he practises for many hours a day, and he relentlessly learns number facts and procedures.  Far from being a mathematicin zapped with powers that enabled him to circumvent practice, Gamm embodies the rigours of practice.