(CNN) -- It's being called the most expensive divorce in the history of ... well, marriage.

Russia's Dmitry Rybolovlev, 47, earned the dubious honor when Geneva, Switzerland's Court of First Instance last week ordered the 47-year-old billionaire to pay his wife, Elena, about 4 billion Swiss francs, according to CNN's French affiliate BFM.

That's a little more than $4.5 billion (little being a relative term).

The couple was married for 23 years but have been engaged in divorce proceedings since 2008, BFM reported, citing the Swiss daily newspaper Le Temps.

Rybolovlev, who owns the French soccer team AS Monaco, which finished second in Ligue 1 this season, is No. 148 on Forbes' list of billionaires. His estimated worth is $8.8 billion, according to Forbes.

Known lately for real estate moves -- including the purchases of a $300 million penthouse in Monaco and a $98 million Palm Beach, Florida, mansion owned by Donald Trump, along with his daughter's purchases of an $88 million New York apartment and the Greek island of Skorpios -- Rybolovlev made his original fortune in fertilizer, according to Forbes.

He and his father, a scientist, started their business in 1990, and Rybolovlev began buying shares of industrial enterprises in 1992, Forbes reported.

In 1995, he was named chairman of the board of Uralkali, Russia's top producer of potassium fertilizers, Forbes said. He sold his stake in Uralkali for $6.5 billion in 2010 and procured a controlling stake in AS Monaco the following year.

The divorce puts Rybolovlev in rarefied company, as only French businessman and art dealer Alec Wildenstein and Bernie Ecclestone, the top dog in Formula One racing, have been reported to shell out more than $1 billion in divorce proceedings.

Answer this series of questions:

1. Who got divorced?
2. How old is Dmitry?
3. How much is he to pay her?
4. How long were they husband and wife?
5. Does he own a soccer team?
6. what team?
7. What court ordered him to pay?
8. How much is it computed to American dollars?
9. Is he on Forbes' list of billionaires?
10. What number does he come in at on the list?
11. How much is he worth?
12. How long has their divorce been going on?
13. Does he own an expensive house?
14. How much did it cost?
15. where is the house located?
16. How did he make his money?
17. Did he work with his father?
18. when did they start working together?
19. What was he appointed in 1995?
1. Dmitry and Elena Rybolovlev
2. 47
3. about 4 billion Swiss francs
4. 23 years
5. yes
6. AS Monaco
7. Geneva
8. a little more than $4.5 billion
9. yes
10. No. 148
11. His estimated worth is $8.8 billion
12. since 2008
13. yes
14. $300 million
15. in Monaco
16. fertilizer
17. yes
18. in 1990
19. chairman of the board of Uralkali,