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Enter a value, an expression, or a term with a variable like 10^n+1 to list a range. Switch to Database id to look a number up by its stored id. Reading never stores anything; use Create to add a number to the database. See the expression syntax & functions reference.

P · Proven prime
id #1100000009123519965 2,191 digits created 2026-08-31

Value

1211189436283734856178549525995689031759971782995127495255266945090124242795947812095629663614601875730422612401878275954269258152609988623010725069372495647285830453643127999993677377931050284959767575992407460330998785528935660151930320305887661855607885905630679944910842756649945458709189240587457529744128822477740911779709515148656733570994434124815196954485277544565373562995088964819425946566028829640829503169554388137159234596207495701308824764495262941623086648039726941949318670612299023807774725207602172827871132587483895137981711913353760790465627423942079973860773453996007156460880573952564992602535801238651991168836768658080495120914789254905332430223707829486570628726151535578834961611287945808157710577008649275529637098476537746849027230868105506230418631282429520058028050136399129146729804411478775455731812790112233575648943711672441149600999556295889337240781465211213797841720950439661857344806917957641185832137153684498547346291759929258809346340674715939152773413660896958583066954355586781389313990084538604448439767151311915898904198178839226440133394119221710121959007820376275946488590724730896273101055088620942523757022398267456770692351661030040997843409323149326556307919481796728692938046267568529916143781649291418645020074808189823902993424986568136302367236209958143567558337629843506715506930154513998570930160624580872388641927354199045217230283750873171883752824560150949098919378954511074944637565268891208537789008236481299759985334751402158610523653701607355147937014719760332098982153968179824182406714531313117453186410931137507600474260821860497539043827862579428440575369124832339585143047420106828169804436031267659525091163512799271369835609975311464596883416858468024327295158066314303347289709619199117179475563666790603240062942485656796235227577084179558824741403137909328136151064484892712323045109785504693507861937451202373231999388722816475156278420250361668703651539165076222092002306412677421508789531410837548749119125111957682543397608612475161882590577514744441135306563939256750264704366221598285765551882211504549037190642952490435372909185191351144324776496642716651951469845907924837217968487922214552369692778999666173
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 85 of the certificate chain of a 3,062-digit prime (314 intermediate primes).

Certified number3,062-digit prime
Certificatedownload
Certificate chainshow step 85 of 314

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009123519965 --detail 2 --decimal
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get_number","params":{"target":{"id":1100000009123519965},"decimal":true,"detail":2}}'