Factor Info

ID 155872
Size 648 digits / 2153 bits
Status composite
Value 666806847240783665686198089678735069375350677790125446134058168478495040603138776947891345846762167372487937592793026642662572292908728147055707494793044089411581342535021676942841290874391679736932183437150273775416222057862456982039171233143466996961457702686214936153438381797672812316990015301339238983808164938627506930015660565278459475598941374768406989804081049017059584515451690877261070700174977768981296467151869279576385433801004395507286494644888349119891813151252921404481277009978547928612297337457677589749131430781770185398242257915632239674606078056285366916874029796215566724573634320046651990655504511934582381653007977778821847

Factorizations

Primary (ID: 154718) 66685632043094378655582637553641418149167535516828458801415092872326088347774211129187093655702612867 (proven prime)
(ID: 189805) 9999258113200034608370345822338682840082203624865518169872244462696609929137323217781239650411162063093813164505256671796055706672533118944440216757602301573849932771109687294848264553160639112852124134020263170429697129679284112149889122839933725696681255271716778600806109240160662524425829283989214708449566509374209352794132026648916938418702519937697919019289844556546213789224214457073690078952776338929735033413600155984237298809096091052102154368669110782995124020544486040322415934421090554113988405098603533091101855869830712542379142941 (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.