Monday, November 14, 2005

RSA-640 Challenge Number Factored

RSA-640 Challege Number has been factored. @#$%

I wasted 1 year trying to factor that number after RSA-576 was factored. Before that wasted 3 years on RSA-576. Thats $20,000 and $10,000 in lost prize money. Could have used that dough. :(

Oh well... will pick myself up again and on with the next Challenge Number: RSA-704. The prize money is $30,000. Could seriously use THAT dough.

The factoring research team of F. Bahr, M. Boehm, J. Franke, T. Kleinjung continued its productivity with a successful factorization of the challenge number RSA-640, reported on November 2, 2005. The factors [verified by RSA Laboratories] are:


The effort took approximately 30 2.2GHz-Opteron-CPU years according to the submitters, over five months of calendar time. (This is about half the effort for RSA-200, the 663-bit number that the team factored in 2004.)

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