Factor Info

ID 128509
Size 780 digits / 2591 bits
Status composite
Value 708842404303256073356791764317649553540012587978366273548708058817154542006870910181346060366087032650742077770102344306661255398363307159104185952016263817427953811899341437333274174842942223246679367083939306486176626745308134049012543403518836178600766148342776718932066889136465798693559261558283175821103439891988205584240124497946962984720292936586204401143887540299898605950779595460056971929462249928857418018429934689526050084672288008523196617458481389469299480154786216285884307718488413626601276214779614501221976090996698381484580639146614618305814771832813507252696162664585313809241721131071043585224277070151447357647809824197929082332612026128999913565899314269071725304736997321310786155845596340274836819774157312583580104491390131925333103271631870155949592401

Factorizations

Primary (ID: 10140) 1977933152128924878248232455784261959944363182166201 (proven prime)
(ID: 128511) 358375308862335394181482667123210793307404052672527631158654005596371998934337744887156928179463511080592153965797977532829415765640146969505389843293842090480523122741557564813025015856508089372467436910034742242841205198734870595614557621320413293839433255438350333620514207285347990593328984376797211644836854814863209343535998181020084900999887296806168541412694548110522620246356605296000414025794236071979773871413642860764983720051609953224413011969338280038598470590361838930458141795912294240093406181126517378948021556039757090205271247209169992066609444683274389936976333284381924187206449731135492712631096975423413817631486333350815437542147504052740910844435990078699796700993041493634203731884427091453488460986201 (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.