prime sieve

Most Popular Posts

This morning I created an image to illustrate how a cake can be cut into four equal-sized pieces using a figure-eight cut (never mind that two of the pieces get ALL the side-icing).  And the post took off like none I’ve ever posted.  It’s so hard (for me) to predict what will be popular on Tumblr.  But I’m glad it includes a little subset of what I’m interested in writing/posting about.

For me and this blog, “taking off” means that it had a hundred or so notes in a couple of hours.  I know compared to some this is lots, and I know compared to some this is nothing.  But I judge from my own weight-class.  And it had me thinking about some of my other “successful” posts (warning, I’m talking about note-counts which I have a feeling is a little like talking about sex or politics used to be):

  • A math/computing post about a Prime Sieve that gives an efficient way to search for prime numbers in a given range.  See it here.  The note count is listed as 34.  I’m sure it used to be higher… or maybe just my perspective has changed.

  • A quote from Richard Feynman about science and sex.  Actually, when you think about it the success of this post among the blogs I follow was sort of a foregone conclusion.  Over 100 notes over a couple weeks..

Science is a lot like sex. Sometimes something useful comes of it, but that’s not the reason we’re doing it.

  • Some comic panels on a philosophical topic from Scott McCloud’s “Understanding Comics”.  This had it all: great visuals, great thoughts, and I got to write as myself with a little analysis.  He was talking about why we humans see human faces in things as simple as two dots and a line.  This one garnered 58 notes.

  • Oh, and the cake post that I just made.  Perhaps besides the quote, the most inane post of the bunch.  131 notes and counting.

A pretty mixed bag that I am happy with, in general.  I’d like to see a little philosophy represented, but what can you do?  I’d tell you about all the posts that I worked hard on but I’m afraid nobody read (we all have those, right?)…  but that’s a much longer list, and anyway it’s too depressing!

anonymous asked:

Ever wondered the logic behind prime numbers? Well our friend Eratosthenes proposed a simple algorithm for finding prime numbers. This algorithm is known in mathematics as the Sieve of Eratosthenes. In mathematics, the sieve of Eratosthenes one of a number of prime number sieves, is a simple, ancient algorithm for finding all prime numbers up to any given limit. It does so by iteratively marking as composite(not prime) the multiples of each prime, starting with the multiples of 2.

my 4 year old once asked why we drink cow pee (milk) because “it comes from cow penises right?”

he’s going to harvard next week