 prices doubled every 15.6 hours).On 18 August 1946, 400,000,000,000,000,000,000,000,000,000 or 4 pengő (four hundred quadrilliard on the long scale used in Hungary, or four hundred octillion on short scale) became 1 forint.North Korea has most likely experienced hyperinflation from December 2009 to mid-January 2011.