Prime number posters

For years Perfectly Scientific Inc. has been producing high quality posters of the largest currently known explicit prime number. Each poster is printed on thick glossy paper and measures 29 inches by 40 inches **. Framed and unframed posters dating back to June of 1999 are available for purchase. Prices vary, as each new prime tests the limits of the technology necessary to print these high-resolution posters.

The digits are very clear, but unless you have very, very good eyesight, you will need one of our watchmaker's loupes or an equivalent magnifier to read the digits.

Save 50% on orders of any 10 or more unframed posters!

Prime	Discovery	Price
	Click for more info	Unframed
232582657-1	Sep 2006	$94
230402457-1	Dec 2005	$88
225964951-1	Feb 2005	$83
224036583-1	May 2004	$77
220996011-1	Nov 2003	$70
213466917-1	Nov 2001	$35
2 6972593-1	Jun 1999	$27
Watchmaker's loupe		$19

** — All prime posters measure 29'' × 40'', except for the poster for the prime 26972593-1 discovered in June of 1999 which is slightly smaller at 27'' × 39''.

Earth lights poster

PSI now offers its specially processed version of a NASA composite of the night lights of Earth. The image was originally generated by C. Mayhew and R. Simmon of NASA to show urban development on planet Earth. For more information on this image see Bright lights big city at the NASA site.

We have been fascinated by this image, in which you can see such entities as interstate highways, population density (relative to the incidence of electricity!), and the fractal structure of municipalities. We processed the image with a certain resolution-enhancing filter to render an attractive, high-contrast, 19'' by 38'' poster for your wall. You can also order this poster in a shiny frame with Plexiglas cover.

Dimensions	Price
	Unframed
38'' × 19''	$24