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Title: Prime Number Spiral
Size: 1700 kB
License: n/a
OS: Win95,Win98,WinME,WinXP,WinNT 4.x,Windows2000,Windows2003
Price: $ 9.00
Publisher: Hermetic Systems
Publisherurl:
Screenshot: Click here to see Screenshot
Downloads: 286
 
Date added: Jan 18, 2006
Click here to Download

The Prime Number Spiral (a.k.a. the Ulam Spiral) is constructed as follows: Consider a rectangular grid. We start with the central point and arrange the positive integers in a spiral fashion (anticlockwise). The prime numbers are then marked. There is a tendency for the prime numbers to occur on diagonal lines, however far out into the spiral one goes. This is software is for exploring the Prime Number Spiral. It also (a) allows coloring of the prime numbers in various ways, (b) displays a random arrangement to compare with the primes and (c) shows how square and triangular numbers are located on the spiral.
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