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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 #1100000009053394621 1,192 digits created 2026-08-07

Value

1555948324519439892203296400070864985689149286458352785536187734749278848766150254770562804400464214927243561069995061665226000740433749508967358800331121348100685273710307675722003456154674086718539251510269139618593757804189774304188133346362061684646714506473694663591994034674057614607230898916397903749071951448589999018175853540718551367772416946521920723046601326005021789256908920681887559748910803853958436646589175733469590841685522654881298307955898901202763980616634360320612461814933869835030131171174912015719692606005212180988784979708735150258533093701604829193170311249451013623770190728558266195965262973067334921151918828932685196097169161917250275253319924190900116074896712344868671754966214790271070022175048483414368210593357148381524882204584288937560151206890134418252314433001649015223677621577573536726249467328728585775342004267566951286026202908415548276613683952618240124118997835604423130692184407082906865686822220482066308021296939572687953965811343593901123539437279336363106565167150227881481741374648068137328162079456139675778288920622729956780761801360525768574123063448431117729224340065623460053369705131659598158290933276265637486171399008580888210163
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 81 of the certificate chain of a 2,201-digit prime (177 intermediate primes).

Certified number2,201-digit prime
Certificatedownload
Certificate chainshow step 81 of 177

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009053394621 --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":1100000009053394621},"decimal":true,"detail":2}}'