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 ...

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 ...

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 ...

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

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 ...

PALINDROME is something which reads the same forwards as it does backwards – for example, words like “civic”, “radar” and “kayak”. Dates and numbers can also be a palindrome – here’s everything you ...

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 ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. A palindrome is a word, sentence or verse that reads the same forward and backwards, that is, from ...