\bib{1990/montgomery} \yr 1990 \mr 90j:11142 \by Peter L. Montgomery \by Robert D. Silverman \paper An FFT extension to the $P-1$ factoring algorithm \jour Mathematics of Computation \issn 0025--5718 \vol 54 \pages 839--854 \url http://cr.yp.to/\allowbreak bib/\allowbreak entries.html#\allowbreak 1990/\allowbreak montgomery \endref