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UNSOLVED PROBLEMS

in Number Theory, Logic, and Cryptography


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Introduction
What's New?
FAQ
Chromatic Number
Collatz
Dorabella Cipher
Euler's Brick
Goldbach
Legendre
Odd Perfect Number
Riemann Hypothesis
RSA Challenge
Square of Squares
Twin Primes
Voynich Manuscript
Zodiac
Solutions
Math Tuition

 

Introduction

 

 

This site is not about the great unsolved problems in mathematics.  For those, see the extensive list at  http://mathworld.wolfram.com/.  For the seven Millennium problems, each of which has a prize value of one million dollars, see http://www.claymath.org/millennium/ .

 

This site concentrates only on problems which are easily understandable to the amateur.  To be eligible for listing, the problem must be explainable on a single screen (perhaps 200 words), using simple terminology. 

 

That is not to say that any of the problems here are trivial - very far from it.  They are all unsolved, despite often many years of attention from very highly trained, very intelligent people.  So, all of the problems here are hard.  Very hard. 

 

The site also provides an opportunity to have solutions published.  If you think you've found a solution to any of these problems, please read the FAQ before asking for them to be published.  The FAQ will strongly suggest that you publish in a recognized journal, and use this site only as a last resort if, after reading the referees' reports, you are still convinced you have the solution (or a significant part thereof).

 

There is a companion Yahoo group, http://tech.groups.yahoo.com/group/UnsolvedProblems/

where these problems and others can be discussed.  The group is moderated, but only to prevent abuse and spam.  Genuine contributions will be approved wherever possible.

 

 


Home ] [ Introduction ] What's New? ] FAQ ] Chromatic Number ] Collatz ] Dorabella Cipher ] Euler's Brick ] Goldbach ] Legendre ] Odd Perfect Number ] Riemann Hypothesis ] RSA Challenge ] Square of Squares ] Twin Primes ] Voynich Manuscript ] Zodiac ] Solutions ] Math Tuition ]


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