Prime numbers not so random? A team of physicists at Boston University testing a statistical tool they had developed to study heartbeat rythyms. (see Kumar, P. Ivanov, P. C. Stanley, H. E. Information entropy and correlations in prime numbers. Preprint. ). The team was looking into the interval between successive primes and conculded that the intervals were not random. The Boston team's findings are not supported by any kind of rigorous mathematical proof. So sadly they can't shed any light on one of the biggest problems in maths: the Riemann hypothesis.