Problems.ru is tracked by us since May, 2012. Over the time it has been ranked as high as 102 599 in the world, while most of its traffic comes from Russian Federation, where it reached as high as 4 634 position. All this time it was owned by Moskovskii Centr Nepreryvnogo Matematicheskogo Obrazovaniya, it was hosted by MOSCOW CENTER FOR CONTINUOUS MATHEMATICAL EDUCATION, Moscow Center for Continuous Mathematical Education and others. While RUCENTER-REG-RIPN was its first registrar, now it is moved to RU-CENTER-RU.

Problems has a high Google pagerank and bad results in terms of Yandex topical citation index. We found that Problems.ru is poorly ‘socialized’ in respect to any social network. According to MyWot and Google safe browsing analytics, Problems.ru is a fully trustworthy domain with mostly positive visitor reviews.