The South Carolina ticket that won had all five numbers and the magic bullet, the Mega Ball 5.
Mega Millions winners have 180 days to claim their prizes after the draw date printed on the ticket.
If the player wins, the person can opt for an immediate cash payment of $904m or receive the $1.6bn prize over 29 years. However, almost all winners take the cash option, which for Tuesday's drawing was an estimated $913 million - before taxes.
Including the jackpot and lesser prizes, there were 15.75 million tickets Tuesday night that earned bettors at least the face value of the ticket.
Lottery officials say someone has won the record $1.6 billion Mega Millions jackpot.
"Sell me another lucky one". The last time that happened was July 24, when 11 co-workers from California won a US$543 million (NZ$830 million) prize.
SC lottery's executive director Hogan Brown appeared on CBS This Morning today and noted that anonymity can help the victor.
The next jackpot victor could come from anywhere.
The $1.6 billion jackpot is the largest Mega Millions jackpot ever and largest ever jackpot in US and world history. We haven't seen a jackpot this big since Powerball hit $1.6 billion back in January 2016.
Mega Millions tickets are sold in 44 U.S. states, the District of Columbia and the Virgin Islands.
It may be days or even weeks before a victor steps forward to claim the prize.
The tickets were sold in 16 states, and they will be paid out to people who got the first five numbers right but not the Mega Ball. A ticket costs $2 - and the victor beat the odds of 1 in 302 million.
Although Tuesday's (Wednesday NZT) jackpot was extraordinarily large, it's no fluke.
It was unclear early on Wednesday whether other winning tickets were sold elsewhere. Its previous lottery record haul was a $399 million Powerball jackpot. In Kansas there were three $10,000 winners and fifty $500 winners.
The identity of the person in SC who won the more than $1.5 billion Mega Millions jackpot may never be revealed, a lottery official said Wednesday. Not too shabby, either.
Here at home - don't throw away your tickets just yet.