The calculators in this site are:

**Big Number scientific calculator:**This high-precision calculator features complex numbers, precision up to 1 million digits and exponents up to 1 billion.**Complex number calculator:**Reverse Polish Notation calculator capable of performing all basic operations, powers, roots, logarithms, trigonometric functions, hyperbolic functions, gamma and polygamma functions. Written in JavaScript.**Generic Two integer variable equation solver:**Diophantine equation**ax**solver, where the unknowns^{2}+ bxy + cy^{2}+ dx + ey + f = 0**x**and**y**can be integer numbers only. Written in Java/JavaScript. Last updated on May 31st, 2001.**Quadratic modular equation solver:**Calculator that can solve equations of the form**ax**. Last updated: May 2nd, 2002.^{2}+ bx + c = 0 (mod n)**Factorization using the Elliptic Curve Method:**Applet that can be used to find 20- or 30-digit factors of numbers or numerical expressions up to 10000 digits long. It also computes the number and sum of divisors, Euler's totient and Moebius, and its decomposition as a sum of up to 4 perfect squares. Last updated on December 20th, 2004.**Gaussian Integer Factorization applet:**Finds the factors of complex numbers of the form a+bi where a and b are integers. It also includes a complete calculator with operators and functions using gaussian integers. Last updated on June 1st, 2002.**Discrete logarithm calculator:**Applet that finds the exponent in the expression Base^{Exponent}= Power (mod Modulus). Last updated on March 30th, 2002.**Continued fraction calculator:**This calculator can find the continued fraction expansions of rational numbers and quadratic irrationalities. Last updated on April 28th, 2002.**Sum of squares:**This calculator can find the decomposition of a number or numerical expression in a sum of up to four squares. It does not need its prime factorization. Last updated on November 27th, 2002.**Sum of four cubes:**This calculator can find the decomposition of a number or numerical expression that is not congruent to 4 or 5 (mod 9) in a sum of four cubes. Last updated on March 27th, 2005.**Polynomial factorization:**This calculator can find the decomposition of a polynomial modulo a prime in a product of irreducible factors. Last updated on January 12th, 2005.