Final Number For Day 1a
According to Seth Palanksy via Twitter, the final number of entrants for Day 1a was 4,722, Quite the turnout and with Day 1b registration open until 11:45 pm and 7,707 entrants it's completely possible that we'll top the 8,000 entrant mark. To put this into perspective, this is now the 2nd largest live poker tournament in history:
2006 WSOP Main Event - 8,773 entrants
2014 WSOP Millionaire Maker - 7,707 and growing
2010 WSOP Main Event - 7,319 entrants
2011 WSOP Main Event - 6,865 entrants
2008 WSOP Main Event - 6,844 entrants
The big difference, however, is this event seats all the players in one day while the WSOP Main Event has always had 3-4 starting days. An impressive feat to say the least.