[dejb]

The point I was trying to make (badly) was that the actual claim doesn't imply P = NP, only that P = NP-complete. Given that factoring isn't known to be NP-complete (or co-NP-complete) this paper doesn't imply that factoring is in P.

[anorwell]

If a single NP-Complete problem is in P, then P=NP. This is what NP-Complete means. In particular, factoring would be in P. Conversely, factoring is not NP-complete, so if factoring were in P, we could not draw any conclusions about P=?NP.