Here's a short answer to the original question:
In 2004:
With 4,088 yards in 2004, Favre moved to #3 on the Career Passing Yards list (49,734)
With 540 attempts in 2004, Favre moved to #3 on the Career Passing Attempts list with a total of 7,004 attempts
With 346 completions in 2004, Favre moved to #2 on the Career Completions list with 4,306.
After beating the Carolina Panthers in Week 1, Favre surpassed Fran Tarkenton (125) to move to third on the all-time QB wins list. He finished 2004 with 135 career wins
In 2004, Favre had 8 games with a passer rating above 100
Favre passed for 4,000 yards for the 4th time in his career (first time since 1999)
With his 30 touchdowns, he reached the 30+ mark for the 8th time in his career
In the regular season finale against the Bears, Favre achieved 51 career passing TDs against the Bears, surpassing Marino's 50 against Buffalo for the 3rd most all time by a quarterback against an opponent
In 2004, Favre had 3 games of at least 3 touchdowns. His career total is 53 and he is second only to Dan Marino (62)
In 2004, Favre had 2 games of at least 4 touchdowns. His career total is 18 and he is second only to Dan Marino (21)
By reaching 20 touchdown passes, Favre broke Marino's record of most consecutive seasons with at least 20. Marino did it 10 straight years, and Favre has done it 11 straight