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UNSOLVED PROBLEMS |
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In Number Theory, Logic, and Cryptography |
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Whats New |
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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.
June 2010: The ABC conjecture and the problem of finding a four-dimensional Euler Brick (or proving its non-existence) have been added to the web site. May 2010: I believe it is now beyond reasonable doubt that the solution to the Dorabella Cipher presented as item #12 on the Solutions page is the correct decipherment. This makes it the only problem on this site to have been solved thus far. December 2009: The Legendre Conjecture has been removed, and Fermats Last Theorem added. April 2009: More proposed solutions have been added to the solutions page. March 2009: A proposed disproof of the existence of an odd perfect number has been added. January 2009: A proposed solution to the Goldbach Conjecture, and a proposed disproof of the existence of an Euler Brick, and a revamp of the web-site. January 2008: A contribution to the Odd Perfect Number problem. 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.
- This web site developed and maintained by Tim S Roberts Email: timro21@gmail.com |
