Overview
This is a web site for amateurs interested in unsolved problems in number theory, logic, and cryptography. Please read the FAQ.
How to use the site
If you're new to the site, you may like to check out the Introduction. If you plan to be a regular visitor, you might like to bookmark the What's New page. Or go straight to any of the problems listed on the left-hand side.
URL
The primary URL for the web site is http://www.unsolvedproblems.org/.
Companion discussion group
There is a companion discussion group, http://tech.groups.yahoo.com/group/UnsolvedProblems/, where questions can be asked and any of the problems or potential solutions discussed.
How you can assist
If you find the site interesting, please let me know. If you would like to suggest any changes, or if you find any expired links, please let me know. Most of all, if there are other problems you'd like to see listed here, please let me know. And, of course, if you think you've solved any of the problems, please read the FAQ, and then let me know.
Math tuition
The owner and developer of this site also provides help with mathematics to students in the age range 5 to 14. For details, please see the Math Tuition page.
Contact information
Please email me.