All right. Let's really put our geek hats on and talk about prime numbers. A little over a year ago I wrote about an enjoyable evening I spent watching the musical Fermat's Last Tango, a fictionalized (and lyrical) presentation of Andrew Wiles' successful effort to prove that Fermat was right about a certain famously generalized form of the Pythagorean theorem. For purposes of the musical, Wiles is renamed Daniel Keane . Anyway, one of the conjectures that has acquired a good deal of importance in elite math-geek circles since Wiles' success is something called the " bounded gap conjecture" concerning prime numbers. As a refresher, a prime number is any number higher than 1 that can be divided only by 1 and itself. There are lots of prime numbers amongst the lowest counting numbers, but they thin out as one gets into the higher ones. 1 is by stipulation not a prime. Two and 3 are both primes. The first integer above 1 that isn't a prime, the...