alt Hacker News> And the number 13 was associated with the cosmos.
Any reason number 13, of all numbers, has been so significant in different parts of the world, sometimes associated with completely opposite meanings (e.g., between Jews and Persians/Europeans)?
> And the number 13 was associated with the cosmos.
Any reason number 13, of all numbers, has been so significant in different parts of the world, sometimes associated with completely opposite meanings (e.g., between Jews and Persians/Europeans)?
generally, 7 and 13 get a lot of attention because a)they are prime b)1/7 and 1/13 have long period when written as decimal fraction - so you keep stumbling in your calculations every time you encounter them
1/7 in base 20 takes surprisingly short form of 0.(1h) (h is 17), unlike 1/9 or 1/11 - so I wonder if there's Mayan prejudice on those instead