An early Indian school that branched off from Sarvâstivāda 有部 about three hundred years after Śākyamuniʼs death. Their beliefs were close to the Mahāsāṃghikas 大衆部, especially regarding the non-existence of past and future factors 過未無體. According to Mahīśāsaka teachings, only the present factor really exists. This school is known in later Buddhist history for its vinaya text, the Five Part Vinaya 五分律, translated by Buddhajīva CE 423–424.