Following their disastrous home loss to the Raiders, the Broncos flew to London, England, for an International Series contest with the San Francisco 49ers at Wembley Stadium. In the first quarter, the Broncos trailed early, with a 34-yard field goal by 49ers' placekicker Joe Nedney. After a scoreless second quarter, the Broncos grabbed the lead in the third quarter, when quarterback Tim Tebow scrambled for a 1-yard touchdown run, followed in the fourth quarter by a 32-yard field goal by placekicker Matt Prater. However, the Broncos suddenly fell behind, with 49ers' quarterback Troy Smith scrambling for a 1-yard touchdown run, followed by his 28-yard touchdown pass to wide receiver Michael Crabtree, and a 3-yard touchdown run by running back Frank Gore. The Broncos tried to rally when quarterback Kyle Orton threw a 1-yard touchdown pass to wide receiver Brandon Lloyd (with a blocked extra-point attempt), but San Francisco's defense stood their ground. Less than a month later, the Broncos were subjected to a videotaping scandal involving the team's director of video operations that occurred during a 49ers' walkthrough practice, one day before the game.
Question: How many yards was the longest touchdown run?
Answer: 3