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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 #1100000009043221663 1,168 digits created 2026-08-03

Value

1268796598932536805025730105609599149833938902327179336779010424045616313602710477857144483094246343954497541065323579338082082214596401704804268487617974439666817058940602662007538209479927937815020222417224215820086919700728438725856110771196726073899775850194855660864136033703818239957438186917439321345839020650809710237603646312747329219426742772206190640319612070651179255909338075996915275139861449259373198592048919154561637543476559549956751616000251037257718537358178400820737831164491296200885199173725948761568887789453945439302309482088521263910623312253426114905200996854265785301356611956416173640198507463046329576922124144631672058173968352011043505381991545687571763489768835735321425551159989135874322501902411436052789448999383000817290433503455035180858882448864010117033319300231829898167347713341556743332786231684429422074413313063128238124200108490620678685809400345537918471258906464031365087500994814562776278402115698086140721160527010803507403857313189471387741594325723808007446437157884692767648103990085488236696653878021684752285406397206430468290626807059965724638980878048952718341556050489571807266405123260351292688024779440665407
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 17 of the certificate chain of a 1,351-digit prime (104 intermediate primes).

Certified number1,351-digit prime
Certificatedownload
Certificate chainshow step 17 of 104

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009043221663 --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":1100000009043221663},"decimal":true,"detail":2}}'