Peyton Manning needs to play 6 more seasons(98 games) without a missed start to catch Favre.
Also according to Wikipedia, if there are games with replacement players, he could lose his streak like Dan Marino did.
Most consecutive starts by a quarterback (NFL) - Wikipedia, the free encyclopedia
It doesn't matter if he sits or not, the media will talk about it uncontrollably, and I will ignore every bit of it. Sick of Favre.