A proof made public today illustrates that Stephen Wolfram's 2,3 Turing machine number 596440 is a universal Turing machine, and it has netted a University of Birmingham undergraduate $25,000. In 1936 ...

IN 1935, Alan Turing set out to build a reputation by outflanking the world’s leading mathematician. Turing was 22 years old, and a new fellow at Cambridge. His target, David Hilbert, was the ...