See also:

• Science: Math: Research: Open Problems  (4)

• L-functions and Random Matrix Theory - Conjectures and open problems concerning L-functions, focussing on the areas in which there has been recent progress using results from Random Matrix Theory. Maintained at AIM.
• Mathematician's Secret Room - Unsolved problems in Number Theory. English and Japanese text by Hisanori Mishima.
• Number Theory Conjectures - A collection of easily stated conjectures which are still open. Each conjecture is stated along with a collection of references.
• Unsolved Problems and Conjectures - Regarding equal sums of like powers, compiled by Chen Shuwen.
• Unsolved Problems and Rewards - By Clark Kimberling. Offers prizes for solutions of some problems in number theory.