Eratosthenes

The Eratosthenes model displays the shadows cast by two gnomons (sticks) at different locations on Earth. For one gnomon, Sun is directly overhead (as would be the case if the gnomon was on the Tropic of Cancer at the summer solstice). The other gnomon is due north of the first gnomon. The sizes...


Platforms: Mac

This script computes an infinite sequence of primes using simple generators. A Python dictionary is used to mark multiples of the generated primes, according to the Sieve of Eratosthenes.


Platforms: Windows, Mac, *nix, Python, BSD Solaris

primesieve is a free software program and C++ library that uses a highly optimized implementation of the sieve of Eratosthenes to generate prime numbers and prime k-tuplets (twin primes, prime triplets, ...) in order up to 2^64 maximum.


Platforms: Mac

A Visual Basic application that resolves any given composite number (up to 999999999) into prime factors, gives list of primes up to 214749239, and counts primes between two given numbers (within 214749263). Form ?Euclid?: resolves any given composite number (up to 999999999) into prime factors....


Platforms: Windows