Coming off from their divisional win over the Buccaneers, the Panthers stayed at home for a Week 15 interconference duel with the Denver Broncos. In the first quarter, Carolina trailed early as Broncos QB Jay Cutler completed a 7-yard TD pass to RB P.J. Pope. Carolina soon responded with QB Jake Delhomme completing a 15-yard TD pass to WR Steve Smith. Denver would retake the lead with kicker Matt Prater nailing a 43-yard field goal, yet Carolina answered as kicker John Kasay ties the game with a 39-yard field goal. In the second quarter, Carolina took the lead with rookie RB Jonathan Stewart getting a 2-yard TD run. Carolina closed out the half with Kasay nailing a 44-yard field goal. In the third quarter, Carolina increased its lead with RB DeAngelo Williams's 56-yard TD run for the only score of the period. In the fourth quarter, Carolina sealed the win with Kasay's 42-yard field goal.
Question: How many yards was the longest touchdown?
Answer: 56