A pass completion.
A pass--if caught then it's a completion and if it's dropped then an incompletion.
Based on career pass completion, Chad Pennington was the most accurate quarterback of all times with a 66% pass completion. He is followed by Aaron Rodgers with a 65.7% career pass completion.
Any offensive stats obtained during a conversion attempt i.e. pass attempt, completion, yards, reception, etc are not counted towards the final box score.
The pass is a dead ball and incomplete
The longest pass completion in Super Bowl history was 85 yards when Muhsin Mahammad hauled in a pass for the Carolina Panthers in Super Bowl XXXVIII. This is not a touchdown pass just a completion pass.
An incomplete pass
The longest football pass ever recorded was about 103 yards.
Calculating Pass Completion Percentage: # of Completed Passes x 100 = X X divided by # of Pass Attempts = Completion Percentage. Example 1 Player TB12 attempted 30 passes, and completed 25 of them 25 x 100 = 2500 2500 / 30 = 83.33 Pass Completion Percentage: 83.33% Example 2 Player PM18 attempted 48 passes and completed 17 of them 17 x 100 = 1700 1700 / 48 = 35.42 Pass Completion Percentage: 35.42%