From a recent newspaper story:

The odds that Joan Ginther would hit four Texas Lottery jackpots for a combined $21 million are astronomical. Mathematicians say the chances are as slim as 1 in 18 septillion — that's 18 and 24 zeros.

• http://www.msnbc.msn.com/id/38229644/ns/us_news-life

I haven't checked this calculation at all, but I'm confident that it's wrong, for the simple reason that it is far more likely that some "mathematician" gave them the wrong numbers than that any compactly describable event with odds of 1 in 18 septillion against it has actually been reported on, in writing, in the history of intelligent life on my Everett branch of Earth. Discuss?