Hermetic Systems » Prime Number Spiral
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Prime Number Spiral 8.59

Free Prime Number Spiral screenshot fileWorks with Windows Vista5 stars award!
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.
Type : Shareware ($9.95) » EULA
OS Support : Windows All + Vista
Date stamp / Size : Dec, 6. 2006 / 1473 kBytes
Asked : A video resolution of 800x600 or better.
Users' value : - Write a Review
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Update history of Prime Number Spiral
v8.59 (October, 13. 2011)
Improved demo version
v8.45 (December, 14. 2010)
Now saves images to PNG files not BMP files.
v8.35 (December, 23. 2009)
Fixed bug in demo version
v8.24 (October, 30. 2009)
Fixed problem with German text.
v8.11 (May, 20. 2009)
Fixed problem with German text.
v8.01 (November, 22. 2008)
Fixed problem with installation program.
v7.91 (July, 26. 2008)
Installation is now fully English-German bilingual.
v7.80 (March, 28. 2008)
Minor improvement to activation process.
v7.79 (February, 17. 2008)
Minor improvements.
v7.67 (October, 22. 2007)
Improved activation-key-request window.
Distribution permissions for Prime Number Spiral
See End User License Agreement
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