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Dario Alpern's Web site

This site contains pages about mathematics and Intel microprocessors assembly language.

Here you will find things that I like. I hope that you like them too.

If you wish, you can sign the guestbook or send me a private message by using a form.

Integer quadratic equations

Quadratic two integer variable equation solver (updated Dec 15th, 2003)

Solves quadratic Diophantine equations (integer equations of the form a x^2 + b xy + c y^2 + dx + ey + f = 0). Now it includes the source code.

Ulam's Spiral (updated Mar 25th, 2004)

Ulam's spiral

Java applet featuring a graphical view of prime numbers.

Factorization using the Elliptic Curve Method (ECM) (updated August 22nd, 2010)

Applet that can be used to find 20- or 30-digit factors of numbers or numerical expressions up to 1000 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.

Discrete logarithm calculator (updated March 30th, 2002)

Applet that finds the exponent in the expression BaseExponent = Power (mod Modulus).