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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 #1100000009078253571 1,239 digits created 2026-08-12

Value

263921657030259049306933159615635256838144699696067751297217111234622068174587039812185836558932919255834413838652858505138226686349225132308817075668175878165627509090393061685262064788484176711598641404175148398957006544230364019140814422906513392476563905462044732126753910520826396020403511504071400734054625447844849060618486716759542195990406760066946748556676023820946517779594283325711842706897874495287865754628161617961813206051639934471570011504368898348733373625765046692688999357599503941102269411384735898268401887562600403312976536894319356929015038344598385640559319783698682365789780771400942395458580243306938432681346443671663858443397412507427535787893189385090250181210576175531963371113678502556561598991628935626150926318152182784929759137604428954066413123480692332170747642272354940512875665684442741373165255241390939559967948215143883328943026073208284044134825219330304139700306480242948630621236908736338054085382550669607496241004479922932320803518826773246423436557502002050851726048587000015590141166555010331698730670606920793585399194898021121999061553506949506821740909257286290598078731000491956203817257422571770988234963459996155669605096957578302872449721098695696900157575426202456265162361690507293
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 77 of the certificate chain of a 2,147-digit prime (168 intermediate primes).

Certified number2,147-digit prime
Certificatedownload
Certificate chainshow step 77 of 168

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009078253571 --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":1100000009078253571},"decimal":true,"detail":2}}'