This month's "Who's Counting" will be an assortment drawn from mathematically flavored stories in the news.
A 13-Million-Digit Prime Number
The first concerns a number that easily swamps even the billions and trillions cited in recent financial stories. We know a lot about the existence of millions of subprime mortgages, but little media attention has been devoted to the existence of a just-discovered 13-million digit prime number. (A prime number, recall, is one divisible only by...Full Story