The Prime Number Spiral (a.k.a. the Ulam Spiral) is formed by marking the prime numbers in a spiral arrangement of the natural numbers. This is software is for exploring the Prime Number Spiral.
CFB Primes is an optimised PalmOS program which can find the prime factors and closest primes of any integer number up to one billion (US) in a few seconds or less. The standard edit menu allows you to make use of the results in other applications. CFB Primes is available free of charge.
Prime sprial plotting software for square (Ulam) and related polygon prime number spirals. Allows multiple prime generating quadratic equations to be displayed simultaneously. Plot data and image files can be saved to disk for further analysis. Demo version is limited to prime spirals based on the square and up to two prime generating quadratic equations.
Factorizer may be used: (1) to get the prime decomposition of all numbers in a range of numbers (2) to get all factors of a single number or all factors of all numbers in a range (3) to find only the prime numbers in a range of numbers (4) to find pairs of prime numbers (e.g. 107 and 109) in a certain range (5) to count (without displaying) the prime numbers in a range of numbers (6) to find Fermat and Mersenne primes < 2,147,483,647
The calculation is intended for the purposes of geometric and strength designs of spiral cylindrical torsion springs made of wires and rods in circular sections, loaded with a static or cyclic loading. Application is developed in MS Excel, is multi-language and supports Imperial and Metric units. Is based on ANSI, ISO and DIN standards and support many 2D and 3D CAD systems.
SurfTris is a Tetris clone with a new twist. Instead of 2D plane, playing field is spread upon a 3D surface. There are five different surfaces to choose from: three closed surfaces - Cylinder, Cone, and Hyperboloid and two twisted planes - C-Spiral and O-Spiral. Game features: - Unique challenges of Twisted and Diversity Modes - Ability to use MP3 and MIDI files of gamer’s choice as game soundtrack - High Score tracking for every surface.
Semi-psychedelic screensaver takes your screen for a spin. The screen is filled with rotating tiles that slowly start to spiral. You can set speed, frequency, size and separate colour channels. New in v1.4 is the One big disk option.
Gravit is a gravity simulator which runs under Linux, Windows and Mac OS X. It's released under the GNU General Public License which makes it free. It uses Newtonian physics using the Barnes-Hut N-body algorithm. Although the main goal of Gravit is to be as accurate as possible, it also creates beautiful looking gravity patterns.
