CALL FOR PARTICIPANTS --------------------- In 1977, a 129-digit integer appeared in the pages of Scientific American. This number, the RSA challenge modulus or RSA-129, has not yet been successfully factored. Factoring it, a 425-bit number, would be a major milestone in cryptography, as it would show that current technology is able to break commonly-used RSA-cryptosystem keys within a reasonable time. Excerpted from the RSA Factoring Challenge news: The "RSA challenge" published in the August 1977 issue of Scientific American (in Martin Gardner's column) is still open, and the $100 prize offer still stands. This prize can be won by factoring the RSA modulus published there, which is: RSA-129 = 11438162575788886766923577997614661201021829672124236256256184 29357069352457338978305971235639587050589890751475992900268795 43541 (129 digits, checksum = 105443) --- End of RSA Factoring Challenge news --- As with several other recent large scale factoring projects, we propose to attack this number with a very large number of workstations independently operating at dozens of research and corporate networks around the world. We are soliciting volunteers to provide compute cycles to help us towards our goal. With the permission of the authors, we will use the publicly available code of the Lenstra/Manasse Factoring by Email project, with modifications by Paul Leyland for RSA-129. The sieving will be distributed around the Internet, with relations transferred to a central site by email or ftp as convenient. Combining the relations and matrix elimination will be performed at ISU, using a combination of structured Gauss and a MasPar dense matrix eliminator. Each participant will be provided with complete source code for the siever. You can easily verify that the program takes no input from your machines and does not pose a security risk. It requires only an email connection to transmit partial results -- the software does not require communication with other machines except for this purpose. It is easy to install, and is designed so that it will take up no CPU cycles on your machine when interactive users or other important processes are active. If preferred, participants can accumulate the results locally and ftp them to the central site manually. The project currently has around 500 workstations which are ready to begin sieving. However, to finish in a reasonable amount of time, this count needs to increase greatly. We are attempting to enroll around 10,000 workstations in this project. This is a call for participants, who have workstations or MasPars at their disposal and would like to participate in this project. All contributions help a great deal. There is a $100 prize associated with factoring this number. The prize, if we win it, will be donated to the GNU project of the Free Software Foundation to help generate more of the excellent software they currently provide. For more information, please mail rsa129-request@iastate.edu. We will respond to all questions quickly. --Michael Graff [project coordinator/programmer] --Derek Atkins [coordinator/programmer] --Paul Leyland [advisor/programmer] --Daniel Ashlock [faculty advisor ISU]