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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 #1100000009059039581 2,028 digits created 2026-08-09

Value

847008205456612850484257305279096253092263924189252896973674765789232776133616394400941622215065133791806114029920920046125346233471055593230161179046002710511483338083404502134808575177619726593264950122326320344161582725820147177500623737118617832280035765027077437210621589737216525871128921877632810430904617082417205598406366863287355971150626261612843336654296997910875462514619367179761938396026520543483666424314472294471494517704971358163749122570545433519653766461413379618608215922047243215212085198509154172716454483653897567581515208411844713911128405798624616780219738609148567307304795554721058965993272152650193646418620945356351595298120064574904865854141657742957829918048937324805843868437299288336021282682983820514040703569287054390987304407974982292978710173862895169888763128780681114382670733194761905076019941023599008203585862242542104428963135592240842026496132060448650169275115737567649085301509806588276747741736215204335227862378352614798770401596248434324783732680663451072298222508594851005396913493657876300101097310800096274883811844668860763102799352334321290364821410906820943816792048989788199064495020988364067051494462392850795090664152389096292341823554662436074097812937780623845385774983273360912795738211517082408834673204206050145072599379623223560295764505891991152751747152165949600280936845708308933230725794478482360765883215809111966949715732315511044620062844053103972814367319332871380351387843690468124378367786676023289351097605062034279668390639553017539004715836338445362740653997422403412155810687767041432301037718398027403997045276962496106516900900526442196881199228537213312617943436545034051172230086378616949188583844652237451818904059655341666994678653346003582709640298309239395519993528180383420114608906535079150686485927182562640138316681924817112685500778258259473384138716397055939494657642768121553341336030865480908509805945265407369593261059620646798909944290305092765183040776001583741866150921411653509437743527165525465138068787060415189846901219244411
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 20 of the certificate chain of a 2,260-digit prime (173 intermediate primes).

Certified number2,260-digit prime
Certificatedownload
Certificate chainshow step 20 of 173

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009059039581 --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":1100000009059039581},"decimal":true,"detail":2}}'