A large family syndicate from Co Dublin has come forward to claim the 175 million euro (£153 million) EuroMillions jackpot.
The winning ticket was sold at Reilly’s Daybreak newsagents in The Naul, in the north of the county.
The jackpot is the largest in the country’s history.
Ireland’s National Lottery confirmed on Wednesday the family had come forward and deposited the winning ticket with them for safe keeping.
Arrangements are now being made for the prize claim to be paid out in the next few weeks.
A family spokesman said: “This is unbelievable. It will take us some time to get our heads around this win and to organise ourselves.”
The spokesman, who is married to one of the syndicate, added: “We are a very close family.
“We meet every week and we take holidays together every year.
“This is a dream come true for us. We don’t want this to change our lives.
“What is so exciting is that we will be able to share this money with children, grandchildren and extended family members.”
One of the syndicate members said she realised the family’s good fortune when she checked the winning ticket on Tuesday night after the numbers were drawn.
She said: “I heard on the RTE news that there was a win in Ireland and I caught the last three numbers. I checked the rest of the numbers online. I was numb.
“It took a bit of convincing everybody that we had won.”
She said she put the winning ticket in an Argos catalogue and put it under her mattress overnight for safekeeping until the family deposited the ticket.
“I didn’t sleep a wink all night,” she said.
The family from The Naul have lived in the area for two generations.
Most of the members of the syndicate are retired and are looking forward to having time to enjoy their winnings.
The family spokesman also said: “We know this is a huge story and there is great excitement over this win.
“We need time to let this news sink in and to prepare to collect our winnings.
“We are a normal family and we don’t want this to dramatically change our lives.”
The National Lottery tweeted on Tuesday night: “Players of Ireland – Check your tickets! Someone just matched all numbers & stars on tonight’s draw winning a massive E175,475,380 and set a new record for the biggest win in National Lottery history.”
The winning numbers were 1, 8, 18, 19 and 39. The Lucky Stars were 7 and 9. Five other tickets won £275,601 (317,493 euro).
National Lottery chief executive Dermot Griffin congratulated the family on the win.
“Happy days like this is what playing National Lottery games is all about,” he said.
“We are just so pleased for the family and that this huge amount is being shared out.”
He added: “The National Lottery exits to raise funds for good causes all over Ireland and this EuroMillions jackpot sequence raised 8.9 million euro for organisations in the areas of health, arts, culture, heritage, youth, community, and the Irish Language.
“That will have a major impact on communities all over Ireland.
“This is a historic day in the life of the National Lottery with the biggest every payout from a draw based game since we were established in 1987.”
This is the 14th Irish EuroMillions winning ticket since the game began in Ireland in 2004.
The record-breaking win tops the 115 million euro (£99 million) won by Dolores McNamara, from Limerick, in July 2005.
The second biggest win was in 2008 when a player from Tipperary won 15 million euro (£13 million) in 2008.
The EuroMillions jackpot had rolled over for several weeks and nearly reached the maximum payout of 190 million euro (£165 million).
This maximum jackpot has only been won three times over the history of the game. EuroMillions is played in nine countries.