Mathematician's Secret Room - Unsolved problems in Number Theory. English and Japanese text by Hisanori Mishima. Unsolved Problems and Rewards - By Clark Kimberling. Offers prizes for solutions of some problems in number theory. 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. Unsolved Problems and Conjectures - Regarding equal sums of like powers, compiled by Chen Shuwen. Unsolved Problems in Number Theory, Logic and Cryptography - Unsolved Problems in Number Theory, Logic and Cryptography, with references for further reading. Seva Lev's Problem Page - A collection of research problems.