text: Eusebius of Caesarea counted 220 , Athanasius of Alexandria counted 318 , and Eustathius of Antioch counted 270 ( all three were present at the council ) .
simplified: Eusebius of Caesarea counted 250 , Athanasius of Alexandria counted 318 , and Eustathius of Antioch counted 270 ( all three were present at the council ) .