The Aṣṭasāhasrikāprajñāpāramitā, or in english “The Perfection of Wisdom in Eight Thousand Lines “, is one of the most important mahayana sutra. Mainly because it was the one heavily referenced and commented upon.
It was the one argued to be the original, earliest form of “perfection of wisdom” sutra (according to some. Japanese argued for Diamond Sutra). The one summarized in Prajñāpāramitāratnaguṇasañcayagāthā.
It was translated in English from Sanskrit by Conze in 1973. While it is readable, I have seen some saying that it’s not that good.
more information at Wikipedia Aṣṭasāhasrikā Prajñāpāramitā Sūtra - Wikipedia
84000.co has finished the english translation from tibetan version. It’s not available for ebook download yet, but it can be read online.
go to “eight thousand lines”