“In addition, an essential step of the project which requires 2 Gbytes of internal memory has been carried out on the Cray C916 supercomputer at SARA (Academic Computing Centre Amsterdam). Given the current big distributed computing projects on Internet with hundreds of thousands of participants, e.g., to break RSA's DES Challenge or trace extra-terrestrial messages, it is possible to reduce the time to factor a 512-bit number from seven months to one week. For comparison, the amount of computing time needed to factor RSA-155 was less than 2% of the time needed to break RSA's DES challenge.”