Nature: Prime numbers not so random?

Not war-related — an interesting article in Nature for people like me who are interested in number theory and chaos theory: Prime numbers not so random?

“Kumar’s team looked at the increments in the intervals between consecutive primes. For example, the intervals between the first few are 1, 2, 2, 4 and 2. The increments are the differences between these successive intervals: +1, 0, +2 and -2.

“These increments are not random, the physicists conclude: they have a rough-and-ready predictability. ‘Positive values are almost every time followed by corresponding negative values,’ explains team member Plamen Ivanov”