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Education > Mathematics > Prime Number Spiral


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Prime Number Spiral 7.80
 Rating      no votes
 Vendor: Hermetic Systems
 OS Win95, Win98, WinME, WinNT 4.x, WinXP, Windows2000, Windows2003, Windows Vista Starter, Windows Vista Home B
 License: Shareware
 Price: USD $15.00
 Size 1412 Kb
Download Prime Number Spiral



     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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