DISCOVERY Channel’s “Raising the Mammoth” scored some mammoth ratings Sunday night.

A total of 26 million people watched all or part of the two-hour documentary over three consecutive airings, making it the most-watched documentary in cable TV history — and the most-watched non-sporting cable event this season.

During its first airing, from 8 to 10 p.m., “Raising the Mammoth” averaged 10.1 million viewers, outrating NBC’s telecast of the big-screen movie “Donnie Brasco” and outdelivering The WB’s entire Sunday-night lineup.

“Mammoth’s” 7.8 household rating far eclipses Discovery Channel’s previous ratings-record holder, “Titanic: Anatomy of a Disaster,” which averaged 4.9 million viewers in April 1997.

Narrated by Jeff Bridges, “Raising the Mammoth” is the first televised account of a 20,000-year-old nearly intact mammoth discovered in 1997 in Siberia.

Discovery Channel will repeat “Mammoth” this Saturday at 8, 10 p.m. and midnight.