Due to the inter-communal ethnic tensions between 1963 and 1974, an island-wide census was regarded as impossible. Nevertheless, the Greek Cypriots conducted one in 1973, without the Turkish Cypriot populace. According to this census, the Greek Cypriot population was 482,000. One year later, in 1974, the Cypriot government's Department of Statistics and Research estimated the total population of Cyprus at 641,000; of whom 506,000 (78.9%) were Greeks, and 118,000 (18.4%) Turkish. After the partition of the island in 1974, Greeks conducted four more censuses: in 1976, 1982, 1992 and 2001; these excluded the Turkish population which was resident in the northern part of the island.

What was the number of Greek Cypriots on Cyprus in 1973?