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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 #1100000009103249877 1,899 digits created 2026-08-23

Value

251139352996527765047847281689785399498037440337979290504423045232206035318571095303308838145408939186917127472241414054581588836014384938931658910460947736189465654736408068515217352646103551023090353144441687960107854891774067624409717181144051990250832412122389229884925329704140138992899822152543347604927090025237272300484015910939197509738612783260198821213770662118672922732957018895077960032882565760349076970801382089771725580069037549628115286346001433981383949311037322533202958147706967964446748268555856021730439038267729662104655699317409899128566869668554586636883369923048971618900657034946027506648389900854220553330748107171457513294616878004817092103514682760328826182862224957627959321855995627127465584341579562094374340383182009138390754588154229565905348666610191877871035566106691541754755143536676522461250267930271064445348164780564317873524943857523404843515813827053801890987567768893438890646596831171628356862386601118876534699435352702078441309664181246782084905024999703360021060397249246328337606258083848209629668054771809213586002194639219862311154069742004615584883628247103548019814174132455462944890049437441553429302129109478391721110923085991858486068757529698005703712466145992825894522643609182304595818930501128958551882886393374617688719817217269108375523010092200237306054941680351507269700276515903080816603280077720003160122646685149117697177853286388338816948219103285904629602639541576256163672925049895984977397866065447830094001949405905012237019295383333356808199315649345049621998255425642498204669687673639467456201336609565815866552049064459704878621976351746928617565519399525066761910334258129338633504313248189740399141311498177720542136678324418039325248635244629663568157943407119104095059489329844970072785017353257599067112387920304821089760110154265144065912796965514379959300914585384338422965769180685202479101473499109490136544997403
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 80 of the certificate chain of a 2,987-digit prime (220 intermediate primes).

Certified number2,987-digit prime
Certificatedownload
Certificate chainshow step 80 of 220

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009103249877 --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":1100000009103249877},"decimal":true,"detail":2}}'