The Federal Reserve recently announced a new design for the $100 bill (above). The bill, set to go into circulation on October 8th, will have new security features, most notably, a blue 3-D security ribbon.
In a press release, the Federal Reserve said the bill “will be easier for the public to authenticate but more difficult for counterfeiters to replicate.”
According to Quartz, the $100 bill was the most popular denomination as of June 30, 2012; at that point, 77% of bills in circulation were $100 bills.
Visit newmoney.gov for an interactive look at the new design and its security features.