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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 #1100000009121227789 2,152 digits created 2026-08-30

Value

2491638506834776026221901506832043822619297965677374328179170001886244963161539700861540235678059954455478732392371162641426368240330093431129563740180104845480076459808234985675999300725980282259027746832252373886588105332483528521097328469137916606282571474163844253176641095863580382079677091135769512370309081268923139182152661957668389438208459288099460308080654562771946270756875096875998395728947574705461841436616493341841703152220471682183299920369145603124516436183129868810436335264005904279446361056209034752303833482226555119665592304918842671205732469140540423653277910705834215656539714519585223334059918542464002338916246736303374609929672621633971271911535455334652541783319042633087237199192389248064280492994973477837002220363762828571280506809275774434646961473703753763802982626775743108451091062233631759733331930851418505430778075498897303052596193282357515839850494410074991986860882850343691727226057288651955810981972933179230549381875641012319971530373517822585467422013101342419139243602718421193186816641682891808507743680416145289150226826180976144787579158171569735597509233441141266692797243571725334673786198482054704240173383363609503423079977237692796144382842800495989969927893301826767689551619791769268684737038523284908869864575512418442751096459518726069828948237032447703030750314230680943554174719428050485331177651574323705071118151801027793496877616639053966839724863015970252253810439233268654170206579834271447565346029186868663735743750650982859881940926058309790620168006335538393333503741637763960342550088807429060584019449045277013931872988498137744392609651373590726596427085206198338430525162075367477429381451283962792645844747099358926306131678639559779958932521544160287986582935118360240268685504737581357989769704949418496872899131656104626538744207145429155896945171600574014571733724829520897546929657998037534100509072184965396732740616636160434202614776074745285196813642554570594068985470572524231175671934440489033993995898539803486269050096959799938940210506335891839198294666301897002367047910056291389316897246649682947570831061943396923650550485130266804436872767192676932984137815379
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 65 of the certificate chain of a 3,048-digit prime (218 intermediate primes).

Certified number3,048-digit prime
Certificatedownload
Certificate chainshow step 65 of 218

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009121227789 --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":1100000009121227789},"decimal":true,"detail":2}}'