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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 #1100000009075279028 2,049 digits created 2026-08-11

Value

638225494617520815031383248627478858488086425265272963765182885895141252770751083488494413220200542457167028469820043710450062436843864322003741742922444700584970681402815437745046147453420595727745408147154653490117226550774739973531784338054384056317376121311890294418208261278754945662599606666180068966686255827392842304600124520735785917887455228125591915511361943428936120263902250797762803864523102405604457594188602922343382886302594406939042054120807328805431234981022899547980662707515103805796693306013022686269249133993719614813982128588702485786085892085166457684956942956688865193573213472602170288398215244035237353718182541903058183237772522141622208597381568270462431503466335272110130375837032676058033964413639984270371292347895987723282783148379828488291739551638930171114152746324357791214453585969027680578683943786341788534371797174625830020259869188524557960451295610929489344292859831188966868209155626339359201151858034705241023011749713956536768232571533308826175732974489549936705354658173259488951817604106732536241323792041531487456294123908729744831490139164010170726540152139778766738019314561853939016358548342786095791922049145609277128814256506279854135694651830613643117742520437677657172366688499195127558014065202864460923582098016594969800230632065206861205532624989299243820018881798585950659562654557372135502295983505107387308172829377939666697577873527107401727420070441956922231041821253380017508453450342325906548416380627879340368457218341969586311342831665264408321528083150870718853265064777757054212033069460646837719286406661871943548193152304010260525444607627468790935692406960238928301954514822957216294551699977696326937204770867078474875301998082241190726129725535158092363980654094523474209163114910347192673521325382932357420598751327868649675107391208202842168540702874827608633326472679078588724256517859106215650820706756616754696146603470770800959792344689295786391144335921774126989906412777498873755681278687330901354177635824298742217935801045487600318745665566802271573826477495930869
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 48 of the certificate chain of a 2,656-digit prime (204 intermediate primes).

Certified number2,656-digit prime
Certificatedownload
Certificate chainshow step 48 of 204

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009075279028 --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":1100000009075279028},"decimal":true,"detail":2}}'