Ivan, in it's lifetime, spent a whopping 60 hours at category 5 status. For comparison, Mitch spent 36 hours there and Isabel spent 54 hours there. The only one that beat it that I could find is Allen at 72 hours. In addition, Ivan has spent an amazing 183 hours (and counting) at category 4 or higher status throughout it's lifetime. I'm not going to go back and see if another storm can top that, but I would tend to doubt it.

With Ivan projected to make landfall as a category 3/4, it's something to keep in mind. This storm had little mercy on the islands it's gone past to date.