After a tough road loss, the Steelers returned home.  With their record at 6-5, they faced off against the 6-5 Colts in a rematch of 2014's 51-34 blowout win.  Adam Vinatieri was able to get the Colts an early 3-0 lead when he kicked a 35-yard field goal.  The Steelers would get on the board when Chris Boswell kicked a 29-yard field goal for a 3-3 tie and then move into the lead when he kicked a 51-yard field goal for a 6-3 lead.  The Colts retook the lead in the 2nd quarter when Matt Hasselbeck found Frank Gore on a 9-yard pass for a 10-6 game.  Though the Steelers responded with 2 straight touchdowns of their own:  Ben Roethlisberger found Antonio Brown on a 7-yard pass (with a successful 2-point conversion) retaking the lead 14-10 followed by Roethlisberger finding Markus Wheaten on a 5-yard pass to move ahead 21-10 at halftime.  In the second half, it was all Steelers when Roethlisberger found Martavis Bryant on a 68-yard pass for a 28-10 game and only score of the third quarter.  In the fourth quarter, Roethlisberger and Brown hooked up again this time on a 5-yard pass for a 35-10 game.  Boswell then put a 42-yard field goal through for a 38-10 game.  Finally, the Steelers wrapped the scoring up when Brown returned a punt 71 yards for a touchdown making the final score 45-10. The defense had yet another stellar outing by forcing 3 turnovers and getting 5 sacks (2 on Hasselbeck, 3 on Whitehurst)
Question: How many yards was the longest touchdown pass?
Answer: 68