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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 #1100000009065128272 2,215 digits created 2026-08-09

Value

7921008291882306266290942228939024104244196538535643217283305337872558086303666848607877067444489009265273369777603689816960228943616145031207473256212436723575576139087017122358987891371149711013046413538205333574017385146049021073708736489086922902394594360954436027531701944152583365068112689848945731841148821252310431112078596986687273790768207816214784654749606183419483369752013381086743133015694120702492051436176729230115749120303291219285376084588639083155597345276757816932523745944116697137669717830255431401340600088405465241585531411211383310859121367705437233869666761367760102507048409437124569945579932681520899571876673782303636531894112076163566546455823055507269832978325170359853850736540294195917728482418833943840998870759663624349922771006050041839868531937130562329535754023042531642362987958018202105666459566192105204562814877855883730433886023477608112954954331472246157666493202077744204179772601573499629827387800768220393563122924807485755842305594059376935966294263558262222703597859873524112111003885916621546356157179694085865439065978481675625971513893196073350824613767550151210488338672183129197175643198883519876904873604861809791607360307065862445877905530006231751739019195223595628607073558377893317756196645375607736504609996818539920743532406549925472812400368243535701281324517894794304401142940983629059098937221310449043975636617992504663414605018220571486592474820987595478517269281406189519801278627141603467979343668792132766097131609757837540051908219398432746938206083063538146431740752735790013391164814990581267583561976662878641365685863706832053952158006136159919507063544055412817063329426808323781737755929329279541714311022344879394164612376488152722246546133505572260601282866361414809073288826133529508024655079961648407822911817437065525882393680378211419197406078679021971476234645642803132733981235955070927424238658525325481929985968906633609090944644599627288029361408424720068312812528212227506218672892520816632204879937318954058031517833959336309292840136469918747526930098744564681640047392619258647973774985326017056150823914940773774420711725188744678670091203879244919764720681555136857598275232489470902092361660793599172165101927250071446423
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 22 of the certificate chain of a 2,485-digit prime (189 intermediate primes).

Certified number2,485-digit prime
Certificatedownload
Certificate chainshow step 22 of 189

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009065128272 --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":1100000009065128272},"decimal":true,"detail":2}}'