Factor Info

ID 191718
Size 648 digits / 2153 bits
Status composite
Value 867178483254998740467392420780453885316914456267547726726490689814567236709808561918936610139179815124557502738646935443949554286048730494668780694556570513479386111474276108557525774127716867995072541446434196765099627436793022273911983944708492790762484423551047717474629841230975435377724666926618939865960225381628554985561148546970225011958670296909957617018018049817087342177944525761647646070341660513728778644527134671776710113156379224687957783302327759486058827528626654271812405568178282253524639580838834350674893940229701025431115099900022404951409997809526524248423813549036451643765660316207380127447812268417890039845763025526928661

Factorizations

Primary (ID: 191307) 217324465815675834842001173711247406035110681 (proven prime)
(ID: 191719) 3990247853596464582386492459391909952879312772928461185561564644292367307378876098266121689898267857466036787612345673708401748877255633148839989092957505908191938937942297601174629450964537141340671550116878189949259025449122894527248425217049504746822041356961275645635249985074639680650707099723721428951900579449808529810345254805974852468031533552136192837687097782515558467438675291359705594309477869070500058056918129997158632880997256076439108062672254601175545938855853182205247087982752465337042784137707983052006264813640558589256789434663080852850377545288670331270934831151729057449433183581 (composite)

Primary factorization keeps track of the smallest (known) prime factor. Secondary factorizations are old results kept when a new smaller prime factor is found, which occasionally happens with ECM.