Woman with Stanford PhD wins lottery four times, $20 million

Joan R. Ginther, a Stanford PhD in statistics, won four Texas Lottery prizes between 1993 and 2010 totaling over $20 million.

Her wins included a $5.4 million Lotto Texas jackpot in 1993, a $2 million scratch-off in 2006, a $3 million scratch-off in 2008, and a $10 million scratch-off in 2010.

Speculation that she cracked the lottery algorithm has circulated, but no evidence of manipulation has been found.

Ginther has lived a private life and rarely spoken about her wins, adding to the mystery surrounding her success.