Memorizing the Qur'an is an activity of instilling Allah's verses into the heart and mind which can later be read without looking at the text. There are many techniques in memorizing the Qur'an and the factors that influence it, for instance motivation. SMPIT Makassar Islamic School is a boarding school that provides memorizing the Qur'an as one of its activities. The purpose of this study was to determine the factors which influence students who pass and do not pass in memorizing the Qur'an. The number of surahs memorized is limited to 37 suras (Juz Amma) in a period of 1 year. In this study there were 63 students consisting of 37 students who passed, and 26 students did not pass

Keywords : Al-Qur'an Memorization, Motivation, K-Nearest Neighbor, Particle Swarm Optimization (PSO).