Factor Info

ID 171221
Size 639 digits / 2121 bits
Status composite
Value 255087367861421054181687612079600214074682990237892514732794055673237796405606204470362801733030868517695605515091477958998703532466781836049347220013736034693403098857696305596030429876356913227627446981018685996446017175930010473746676725326283349596695868405018489525098284690476189712599894431202368599353343102568370616303958383381309551862557296923988746639653077552212166509623824711611660625819570298372413455079176247585473024524187062255751690693573324671749443981734088029321316108317411072022436248149212505427902410323709307219267558765433579891937915670890948547649558797074475392923028871637298932828589126609420891428201777

Factorizations

Primary (ID: 170321) 157100107884470195344553656989966699361 (proven prime)
(ID: 171222) 1623724969361635847546381062247074207294858253602826436595006804109570962040698129827170645965308691208780789856928605108102446284199357002751021724367619174995442263228503815239745546861199815397655342998958437131415743629423420870998297529486289490580071254268458162023128472378061774062784708477200367909077635330586094267823551133789947412986344315527785600396953571426647312051153425490396736093971134563335988091289723974175365720716384314892627511097150982458055700621937238500983002373013694848917797729218948892604309979761214009558570967117071057282075390203672747634812462366975603662306257 (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.