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JavaScript, 103

This implementation is based on primo's comprehensive description of the algorithm he used.

for(x=prompt(e=l=1),g=1e5;--g;y=x-1,y/=x>1?x:1,l=y/g+(y<0?-y:y)*l)
  e=1+e/g*x;
alert([e,(x>0?l:"ERROR")]);