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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 #1100000009058888556 1,944 digits created 2026-08-09

Value

393321539837696550319214838302152476410205495825072880741929464116995370944337331085931428127427967332378349499480035117791109671893990297179726395519453247132844527556773923386323836414344868957993045164917226063851481926920111021233451471495895515570167236227213003424131363628567711039081078109876656500347007901470788044833658747630205658360563824569164788232336882198629879538479564943849102954229315472687049854586623439363920247630066941966124359371857453302695361362849806536716695611950425744108620965492221485452552196066721068198457854091617778994806154703709916779790425946074353691307654590946612137597849760051646582141784975025204958812709440720315063182107010103106342327951762393789163920814895717970685975129742147013037831404053636374183016973835280131350051895427020022101533636061485412101381911024172985654554687972770435989937820213904564554837929074737693554915466181456729310566750025326986995291848947202346018379156765755455490506382165688824888839048163192648825462321965103887116741487577708338125991266331674767700520740764305570836316204402338117082134037256140084071597739733280450576623978311636679556700176906477954785395876624086707133938390264956820494548831475711595491485320052327267079482229622690078484609263540635383350293709591346088190904982596862335995987216430448538200611159427993837025831491411850912996191534816063072885802205339634512195607272747300919938203517252642524172621704977540540651228033638378093056662284741430336859251682067552133625485697885312987074330268439388810575895757684937990353895781803583945526037755595840175248654744737022181904326821042199893351190546403146184238815894307268751708015691474680423883219512223010635957160013314838977368201488834830569662096021996098982431386815043353796690815077337076540330305145190343975400033431598216511074016119958622770899503878435921848700589902463845875955451572133771671913565557369172839115966761898523957532465415839490208799
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 27 of the certificate chain of a 2,260-digit prime (174 intermediate primes).

Certified number2,260-digit prime
Certificatedownload
Certificate chainshow step 27 of 174

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009058888556 --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":1100000009058888556},"decimal":true,"detail":2}}'