Although it recurs every year, June 28, or the 28th day of the 6th month, is special. It represents the only day of the year where both the date and the month correspond numerically to the first two ...

As a high school student in the mid-1990s, Pace Nielsen encountered a mathematical question that he’s still struggling with to this day. But he doesn’t feel bad: The problem that captivated him, ...

Perfect Numbers Six is such a number: it is the sum of all numbers that divide it except itself. In 2,000 years 12 perfect numbers were found; now a computer has discovered five more ...