Alan Turing spent WW2 working independently on cyphers and codes.
According to the memoirs of the German computer pioneer Heinz Billing from the Max Planck Institute for Physics, published by Genscher, Dsseldorf, there was a meeting between Turing and Konrad Zuse
 Despite this, Turing continued to show remarkable ability in the studies he loved, solving advanced problems in 1927 without having studied even elementary calculus

