Tonight's Euromillions jackpot draw will be a record €130m.
If no-one gets all the lucky numbers, then the total will roll down to the next prize level where there are winners.
Tonight's jackpot, which follows a €27m win last Friday, is not a rollover prize but a special 'super-draw' that the organisers hold every so often.
It is nearly a year since the jackpot was rolled down to the next prize level and 18 European winners, including two Irish players, won €9.6m each.
If the jackpot is won by just one person then they will become the largest euromillions winner ever.
The record is currently held by Limerick woman Dolores McNamara, who won €115m two years ago.
The Euromillions game is played by nine European countries and in Ireland it is managed by the National Lottery.