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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 #1100000009053961400 1,952 digits created 2026-08-07

Value

28373918612946350126608561927514678649458760779927368569703557386332334277150015825056068573441760267653442303627335045756981112013254115582734325340657614837313789791690812439155550225903228445319510844657394843088391351691251747723864186940709121817760385712798842543811241846409919283384018201664034143479276881561357760437439138098247491649117446280302218463923264103197615244077111811113234295950264826180579407163092325246742555206527362727687987226802702259440731789623903647474046850968830445072360388468853052601612283732021544195137508785421892612589553141366780680056385926602790948629156641444700167160647717916683378920770223401499285220766409361214425410326602195971738358857658304394659307811386891762880351542960533870105525454307453861792195818648305589612033507431862076475694715295007107710398687719643731791975453699436059334600176938712347931012044623004038911414074884565099113707393837392717371309612106385989429966598824492475077821270388805973902120178820277030965321845599689597487689353720928258717513245160869427264614937868237152826428773192798268305008866244267403768497452318111726917550261799109119795935650671710447435104874901696535797789531139710735325933229564667082727026199247359968583129780620217320198899031298535280634093829213673528317837957105501257237505727361155956794418355556232014698188026404296993651243931664608318140745989186615593370548828575799992754929882007194588830481129434720972825271599790015548426044267862846510284564704617312340251056718784296067733440694699739925029352668658659002958715778680966102349606859724249130296688620185762515258025695010259851353356997105945889751935963373554428825966909603872821910309236409860330001175868691641630746596239966209069813969535754502678550721737038751992022164846093548788109457038999794593387844469246984608339287655160082598844819607784244080545369283951088438993900139667201293089246500191586727426491848771423102241461793972008824590606563531
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 31 of the certificate chain of a 2,306-digit prime (174 intermediate primes).

Certified number2,306-digit prime
Certificatedownload
Certificate chainshow step 31 of 174

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009053961400 --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":1100000009053961400},"decimal":true,"detail":2}}'