iplayfast writes: "The RSA Factoring challenge used to be here has quietly disappeared. RSA Laboratories has been sponsoring the RSA Factoring Challenge since the 1990s as a way of highlighting progress on integer factoring, the mathematical problem underlying the security of the RSA public-key cryptosystem. The research community has done excellent theoretical work on algorithms for finding the prime factors of very large numbers, and it's always nice when the algorithms are put into practice and prime factors are actually found. The challenges offer a showcase for such accomplishments. So does this mean all the challenge numbers have been factored? Who won?"
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