Project Euler Attempts to code the most inefficient & efficient algorithms. Solutions 001 - Multiples of 3 and 5 PHP (3 attempts) 002 - Even Fibonacci numbers Perl 003 - Largest prime factor Python 004 - Largest palindrome product Ruby 005 - Smallest multiple Java 006 - Sum square difference PHP 007 - 10001st prime Python 008 - Largest product in a series Python 009 - Special Pythagorean triplet Python 010 - Summation of primes Python