Nonsensical claim The article states It was described by D H Lehmer and R E Powers in 1931 and developed as a computer algorithm by Michael A Morrison and John Brillhart in 1975 The continued fraction method is based on Dixon s factorization method Ridiculous If the method was decribed in 1931 then it is not based on Dixon s factorization method assuming the 1981 date listed in the WP article is correct It might be a version of or related to Dixon s method But it certainly is not based on it I hope someone knowledgeable about this subject will fix this with appropriate wording