Answer based on context:

Trying to break an eight-game losing streak the Bengals played on home ground for an interconference duel with the Saints. In the first quarter, the Bengals trailed early as kicker Garrett Hartley nailed a 48-yard field goal. They replied with kicker Clint Stitser hitting a 29-yard field goal, but the Saints scored again with RB Chris Ivory getting a 55-yard TD run, with the Bengals responding as Stitser made a 23-yard field goal. They struggled further as Hartley made a 24-yard field goal, followed by Ivory getting a 1-yard TD run. The Bengals narrowed the lead as QB Carson Palmer made a 5-yard TD pass to WR Terrell Owens (With a failed PAT as the kick went wide right), followed by RB Cedric Benson getting a 1-yard TD run. The Saints responded as QB Drew Brees completed a 52-yard TD pass to WR Robert Meachem, but the Bengals fought back to take the lead for the first time with Benson gettingt a 4-yard TD run (With a successful 2-point conversion as Palmer passed to TE Jermaine Gresham), followed by Stitser making a 47-yard field goal. They failed to maintain this lead after Brees threw a 3-yard TD pass to WR Marques Colston.

How many yards was the longest touchdown pass?
52