The Cornhuskers (6-0), who didn't play on Saturday, extended their record consecutive appearance streak in the AP poll to 300 weeks. The last time the Huskers were unranked was Oct. 5, 1981.
Florida State has the second longest current streak at 174 weeks.
Michigan State and Syracuse took the biggest tumbles in this week's poll. The Spartans (6-1) dropped six places to No. 11 after a 52-28 loss to Purdue and the Orangemen (5-2), ranked 16th entering the weekend, fell out of the Top 25 after a 62-0 loss to Virginia Tech.
The Seminoles (7-0), who beat Wake Forest 33-10, received 62 first-place votes and 1,742 points Sunday from the 70 sports writers and broadcasters on the AP panel.
The Nittany Lions (7-0), who beat Ohio State 23-10, had six first-place votes and 1,678 points, while No. 3 Nebraska had 1,580 points.
Virginia Tech (6-0) remained No. 4 with two first-place votes and 1,561 points.
The Crimson Tide, a 30-24 winner over Mississippi, moved into the Top 10 for the first time since 1996.
The Boilermakers moved up four places with their win over the Spartans.
Southern Mississippi, a 24-0 winner over Army, was No. 21, followed by No. 22 Ohio State, No. 23 Miami, No. 24 Minnesotaand No. 25 Mississippi.
Seven teams are unbeaten Florida Stae, Penn State, Nebraska, Virginia Tech, Kansas, Mississippi State and Marshall.
Ohio State (4-3) and Miami (2-3) are the only teams with three losses in the poll.
For the second time in three weeks, the Big Ten has seven teams in the Top 25 Penn State, Michigan, Michigan State, Purdue, Wisconsin, Ohio State and Minnesota.
In the USA Today/ESPN coaches' poll, the top five are Florida State, Penn State, Nebraska, Virginia Tech and Tennessee.
The Bowl Championship Series will release its first standings on Oct. 25. The BCS standings, a combination of polls, computer rankings, strength-of-schedule and won-loss record, determine the teams that will play in college football's designated national title game.
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