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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 #1100000009065128255 2,258 digits created 2026-08-09

Value

17166488733335592116085162824963688700149057643426911883948893053921973006451897569958577785683958813660058005866312225976050297881092642743065933667748480242196673156124323605178692872407179199712770222172364137623869450940561300604072337435319357611777257781052574073405789866490184536885415197291036214772270693321755976600340544893912964570859205733888368044039224925817432730426369104937506688609772420574258700184071318450317132790110127312184713854918473518484854579682865918675125799959943528836109740221792475780153727320920697571967380839756282963640788567179418190785832985364356877235982958399196467666894802413240138885782206465867846305951024890405202078856335993020419765952827135944293788164727475592841420606287366886573677085133448224194559794980633840122237014390318044746069296740257531971589424420991974445469335568947376355080440361748357683081992074961681676116066672517547765415334443453368186831744454841545092622103701939219860436179272749567337034600754605916043339702193374961480438711502849688095695253062487534443629707331806422359624408859374797277382916579450519784037337161159110517520171024297949774556031692572996653790234125504022702072802562269664270553837169437301053419564177928473982374694965437548844345789180889526936551461661614345869791920440187758345159010049875363461055076961540514232657857489341562891203593130015404561334217233395371456183087326919700533101134070381636296435130038789296175425238032872279307843741377803210934873512093314488620410618718554099106894855633023128821465839189554108984188594088155630989788738987052476816426637517608374869429077603367822787991409222911243229137972084546474903945345384400880769957043399790305134549821423583691190093670589083099101517064749601261912894593663052833525096244696337635820690552547197364061341851768196607648747353726893980539869168555784384587671051962178991388280230374152083971710840148770667157337041698106397229093637949370271191418875806352824783155282124570856488227258124544848225207394449900774264054153802208009184796602764594374336438391237430134575067982511225317054984985776802698635606062293904447829070432780135212007225560729510283479394676418519381288856027021416441883557375153090270134290419714428238348780801100002997513322402203
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 19 of the certificate chain of a 2,485-digit prime (189 intermediate primes).

Certified number2,485-digit prime
Certificatedownload
Certificate chainshow step 19 of 189

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009065128255 --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":1100000009065128255},"decimal":true,"detail":2}}'