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.
Quadratic modular equation solver: Calculator that can solve equations of the form ax2 + bx + c = 0 (mod n). Last updated: May 2nd, 2002.
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 BaseExponent = 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.