What is the longest novel?

Remembrances of Things Past? (Is that more a novel or a memoir? I’ve never read it.) Les Miserables? War and Peace?
I don’t mean works in a series (like some of Stephen King’s), just the longest single novel.

Oops, strike that “s.”

According to the Guiness Book of World Records:

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Here’s a link directly to that entry: Literature : Longest novel

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