There is one more assumption that should be discussed here.
Which is that the number “512,027” must be since the first time “Bodhisattva” decided to become supremely awakened fully enlightened omniscient Buddha.
Source does not deliberately say that, but that must be true.
Because in beginning less saṅsarā, all Lifestream have practically encountered infinite Buddha. That infinity (times when Buddha was encountered) is ofcourse subset of much much larger infinite set (of times when Buddha was not encountered).
(There are different types of infinity.)
