Official results from Georgia's primary elections show just 584 votes separating Republican rivals Rick W. Allen and Wright McLeod in the 12th Congressional District, meaning a recount might be required to determine which candidate advances to a GOP runoff in two weeks.

Secretary of State Brian Kemp certified the results of the July 31 primary on Tuesday. Because the official tally shows Augusta businessman Allen winning a runoff slot by less than 1 percent of the vote, Augusta attorney McLeod has two days to request a recount.

McLeod spokeswoman Holly Croft said the candidate won't announce any decision immediately.

The prevailing candidate will face state Rep. Lee Anderson of Grovetown in the runoff on Aug. 21. The winner will challenge Democratic Rep. John Barrow of Augusta in November.

Tags: John Barrow, recount, Republican Primary, Rick Allen, Lee Anderson, Wright McLeod, 2012 Georgia primary