The second game of 2015 against the Packers was held on Thanksgiving Day in Green Bay. The two teams, in their 190th meeting, had never played each other on the holiday; in Thanksgiving games, the Bears were 16-15-2, while the Packers were 14-19-2. Chicago's offense took on a defense that ranked second in the league in first quarter points allowed with 1.9, along with a defense that recorded six sacks in week eleven against Minnesota. Jeff Joniak added that the offense had to improve its red zone performance; against Denver, the Bears failed to score on three of the four trips to the red zone, leading to a 41.2 percent touchdown efficiency in 2015; in ten games, the Bears were only able to score 14 touchdowns within the 20-yard line. On the other side, Joniak stated the defense had to stop the Packers offense early; since 2014, the Packers had outscored opponents 151-27 at Lambeau, while also leading the league in first quarter points with an average of 7.6. Aaron Rodgers had thrown eight first quarter touchdown passes (the most in the NFL) in 2015, while the Packers had a league-best +57 scoring differential. Meanwhile, the Bears defense had allowed nine touchdowns in the first, though the defense had not given up a touchdown in the third quarter. Joniak also wrote that the Bears had to "match and surpass the emotion" on a night that featured Brett Favre's jersey retirement "with their most physical, error-free and consistent performance". Eddie Royal, Ka'Deem Carey, Martellus Bennett, Antrel Rolle, cornerback Jacoby Glenn, Nick Becton and Will Sutton were inactive. The Bears won the toss and deferred. The first four drives of the game ended without scores, as the Packers turned the ball over on downs during their first drive and the ensuing series were punts. On the next drive, Tracy Porter intercepted Rodgers, but was penalized for illegal contact, and the play was nullified. Afterwards, Rodgers threw a 25-yard touchdown pass to Lacy. The Bears' woes continued with the following kickoff, when Marc Mariani and Deonte Thompson collided while attempting to catch the kick and the latter had to kneel in the endzone for the touchback. The next four possessions led to punts; on Green Bay's next drive, Lacy recorded a 15-yard run, but was hit from behind by Chris Prosinski and fumbled, with the ball being recovered by Lamarr Houston. Chicago took advantage of the takeaway when Jay Cutler threw a three-yard touchdown pass to Zach Miller. However, on the next kickoff, nickelback Bryce Callahan missed a tackle and allowed Jeff Janis to record a 64-yard return; the Packers eventually converted it into a 22-yard field goal. Assisted by a 37-yard kickoff return by Thompson, the Bears offense scored with Cutler's 20-yard touchdown pass to Marquess Wilson, but the play was overturned after he was downed at the one. Afterwards, Jeremy Langford's one-yard run gave the Bears the 14-10 lead. Mason Crosby kicked a 50-yard field goal to end the half. The third quarter featured no scores, though the Bears' last drive of the quarter (which lasted into the final quarter) ended with Robbie Gould's 21-yard field goal to extend the lead by four points. After two further punts, Rodgers' slant pass for Davante Adams was intercepted by Porter. However, the Bears were unable to capitalize, and punted. With 2:23 left in the game, the Packers drove from their own 20-yard line to the Bears' eight. Rodgers' passes to James Jones, Richard Rodgers and Adams all fell incomplete, and Cutler kneeled once to seal the win. With the win, the Bears won their third consecutive away game for the first time since 2012. Over the last four games, the Bears allowed less than 20 points in each, also last accomplished in 2012. The game averaged 27.8 million viewers, the most-watched Thanksgiving primetime game in NFL history and the second-highest viewed regular season game for NBC.
Question: How many yards was the shortest field goal?
Answer: 21