3,105,349.That’s the number of Kentuckians who are now registered to vote in advance of the primary on May 20.The number is over a two percent increase from two years ago, according to the Kentucky Secretary of State’s Office.There are about 400 seats up for a vote this year, from judgeships to state legislators up to the hotly contested U.S. Senate reelection campaign of Mitch McConnell.But the new numbers will likely only marginally affect the historically-low turnout in primary elections: Two years ago, only 16 percent of registered voters cast a ballot in the primary.