@article{1988-young
,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1988/\allowbreak young}}
,author={Jeff Young and Duncan A. Buell}
,ISSN={0025--5718}
,journal={Mathematics of Computation}
,MR={89b:11012}
,pages={261--263}
,title={{The twentieth Fermat number is composite}}
,volume={50}
,year={1988}
}