] Based on a detailed design and simulation (but without an
] actual implementation), we believe that the NFS sieving
] step for 1024-bit RSA keys can be completed in less than
] a year on a $10M TWIRL machine, and that the NFS sieving
] step for 512-bit RSA keys can be completed in less than
] 10 minutes on a $10K TWIRL machine.

Time to up those key sizes again.

[IP] Fast factoring hardware