241543903 (a.k.a “Heads in Freezers”) is a numerical keyword associated with a photo meme that involves people taking pictures with their heads in the freezer & sharing them online. By tagging a series of image files with a cryptic number, a high level of search engine optimization can be easily achieved. As a result, typing “241543903” into image search engines like Google Images successfully yields pages after pages of pictures showing people’s heads in freezers.
Origin
On April 6th, 2009, David Horvitz[2], a New York-based artist known for his often eccentric DIY instructional projects[3], posted a picture with his head in the freezer titled “241543903” via his Flickr account SanPedroGlueSticks[4] (shown left). Days later on April 10th, the same numeric sequence “241543903” appeared in a Tumblr post which provided the following instruction for readers (shown right):