Venezuelan opposition leaders claim to have gathered enough petition signatures to force a referendum to recall President Hugo Chávez; in response, the government alleges the four-day signature drive was tainted by "massive fraud". 
The US dollar continues to decline, hitting a new low of 1.2 against the euro; the dollar is suffering from deteriorating support against the background of a large current account deficit and fears of growing protectionism. 
GIMPS has confirmed that 220996011-1 is prime. At 6320430 decimaldigits, it is easily the largest known prime number. 220996011-1 is the 40th known Mersenne prime and the 6th Mersenne prime discovered by GIMPS.