http://www.cnn.com/2003/TECH/science/12/11/prime.number.ap/index.html (http://www.cnn.com/2003/TECH/science/12/11/prime.number.ap/index.html)
CNN.com is not good for real mathematical/technical information.
More information here:
http://mathworld.wolfram.com/news/2003-12-02/mersenne/