This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American You may know tomorrow, June 28, as Tau Day, a ...

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 ...

For more than 2,000 years, mathematicians have searched for a single example of an odd perfect number—and found none. Computers have tested candidates beyond 10^2,200, while 51 even perfect numbers ...

You may know today, June 28, as Tau Day, a celebration of the number 2π, which some people believe to be the superior circle constant. I prefer to observe the most mathematically perfect day of the ...