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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 #1100000009126645378 1,250 digits created 2026-09-01

Value

20583245283578849183775641916684433243305380884617759164079795276938581520036788262818997130110779715245572571270437294265413178945095071915264679357212098637565910876676503288456759458838969350710115840045696151844600874613410965970241798699514805651985623044471126293600845693984092851546763033314548759023371361435205118312768412979745848362417291610083139300771263436742281387419253074579390799592403232631264849427577393934865659139162799734770421857410087368424295694041106464748451091302937691130512862341598500140413933214834136346063416197339532900906088348863330040666771946322827385750074604908721092474880958062968433789797939747502039681501937678038928182276889475530337561575727842612704744088069356758475353396211665728985982997593765979674882519051733360310477179032140150331665906913603728735671611894627141538743648857616758560408166436361851949326241194642926693194466649117621229736370442276661388239819472421308918931777104686705939573348989690713743655393998008920006099348435952838287614468400306917704825999519188487495911153716053848799584997682459572119489593108287532716149285773619457597209775225295318073304242654918434415245998054198599832703932238145528159953252891892241886023312186294190508548755626250179636625036177
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 180 of the certificate chain of a 3,110-digit prime (313 intermediate primes).

Certified number3,110-digit prime
Certificatedownload
Certificate chainshow step 180 of 313

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009126645378 --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":1100000009126645378},"decimal":true,"detail":2}}'