The number 1888081808881 is interesting on several counts. First, it’s a prime number, evenly divisible only by itself and 1. In base 10, it’s also a palindromic number. It has the same sequence of ...

Sometimes, a certain number catches your attention for no apparent reason. You don't understand the meaning. Yet, you see it again and again. You could pass that number off as mere coincidence. On the ...

Do you believe in angel numbers as a sign of luck, good karma, confirmation or empowerment? Did you feel particularly hopeful on days like 2/2/22 or 2/2/24? Do you make a wish when the clock reads ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Mathematical revelation is often manifested ...

Are you overlooking any rare “radar” banknotes in your wallet or purse?

This past week’s puzzle, as previously posted: Regular numbers are numbers that evenly divide powers of 60. As an example, 60 2 = 3600 = 48 × 75, so both 48 and 75 are divisors of a power of 60. They ...

I've made the Prime Number Tester accessible to all subscribers to the Premium, ad-free version of Boing Boing. Please subscribe to support Boing Boing for more goodies to come! The post "Demonic" 666 ...

This week’s puzzle, as previously posted: The smallest three-digit palindromic product of two, two-digits numbers happens to be a perfect square: 11 x 11 = 121. The largest three-digit palindromic ...