Mystery surrounds the identity of the lucky punter who owns a EuroMillions Plus ticket worth €500,000.
The ticket was bought in in Ballinaboola, Co Wexford on the day of the draw yesterday, Budget Day. It was a Quick Pick ticket.
The jackpot of €168m was won in Belgium.
Meanwhile, in another stroke of luck for the south-east, a winner from neighbouring Carlow has come forward to claim a Lotto Match 5 and the Bonus prize of €111,049 from Saturday's draw.
The winner said: "It is all so much to take in. It is a surreal feeling to be in the National Lottery picking up a cheque for what is a life changing amount of money for our family.
"It only feels real when you finally get the cheque into your hand. I am going to take some time out and think about the win. My family and I are going to plan a wonderful Christmas and after that, we will make some decisions to put some money away for the future."