UNSOLVED PROBLEMS

in Number Theory, Logic, and Cryptography

What's New?

This page lists recent changes to the web-site.  If you intend to be a regular user of the site, you might like to bookmark this page so that you can see at a glance what has changed since your last visit.

July 2007: The owner and developer of this site is now offering mathematics tuition for students in the age range 5 to 14.  For details, please see the Math Tuition page.

June 2007: The Zodiac killer's 340 cipher has been added to the web site.

May 2007: Two proposed proofs of the Riemann Hypothesis have been added to the Solutions page.  Also a proposed solution to the Dorabella Cipher.

February 2007: The Euler Brick problem and the Legendre Conjecture have been added.

January 2007: Several typos have been corrected.  The existence of the site has been announced on a few relevant newsgroups.  The Square of Squares problem has been clarified.

December 2006 : The whole site is new!  Please read the Introduction, and check out the FAQ.

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       Site developed and maintained by Tim Roberts .
       Last modified: August 01, 2007                        v 016