Has a FIBA World Cup game ever ended 104-50?
Exactly once. On August 25, 2022, Australia beat Bahrain 104-50, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 104-50 in league history.
That makes 104-50 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 105-50 has happened never and 104-51 has happened never.