More dates were added, and quickly sold out.
When those dates sold out through Internet promotions even before going on sale to the public, two more dates were added.
Those sold out within minutes of being released last Friday, and again two more dates were added, which also sold out by the end of that day.
Tickets for the Monty Python comeback performance sold out in a very precise 43.5 seconds, it was announced on Monday as four more dates were added.
When the finished cut was recorded on the hard drive system, start and kill dates were added to the database; if the programmer selected the spot after that date, a visual warning would indicate it was not to be used.
After 13 years out of the spotlight, his comeback tour was due to begin in Dublin's Croke Park on 25 July and sold out within minutes, so two more dates were added, bringing ticket sales to a staggering 400,000.
That average is 23.25% above the combined average before the special guest dates were added.
Following the initial announcement of 15 dates last week, seven more dates were added in response to "massive pre-sale demand".
The Monty Python troupe announced last November they were reuniting for a one-off stage show, but after tickets quickly sold out an extra nine dates were added.
Later dates were added for Plattsburgh, Ogdensburg and Watertown.
