The full recount for the constituency was announced on Thursday morning.
A full recount and recheck was ordered in Ireland South on Thursday morning, after a request by Sinn Féin candidate Liadh Ní Riada following the 18th count.
News has since emerged that the recount in full could cost up to €1 million, and could take up to a month to complete.
RTÉ have said that the constituency's returning officer Martin Harvey has said that the full cost has not been estimated yet, but that it could cost up to €1 million.
Making the recount announcement in Cork, Harvey said: "Having completed the recheck of Liadh Ní Riada and Grace O'Sullivan's papers, Liadh Ní Riada has confirmed that she wishes to proceed with a full recount of all the papers.
"Accordingly the count is now adjourned and will resume here at 9am on Tuesday next the 4th of June."
He also said it will be difficult to get the necessary staff to carry out the recount, but that it will be done and that it will take time.
Experts have also suggested that a full recount is unlikely to see a different result.
