2013 is not a prime, although at first glance it looks like it maybe ought to be. It's divisible by 3, 11, and 61. Three and eleven at least are useful primes, tools for nice, neat, aesthetically satisfying factoring. Sixty-one is just annoying. It's one more than the beautifully divisible 60. -- 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 -- so useful the Babylonians used it as their base -- and then someone goes and spoils it by adding a lousy 1. Anyhow, 2013 is still kind of an awkward-looking number, IMHO.
skip to main |
skip to sidebar
No comments:
Post a Comment