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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 #1100000009057950200 2,124 digits created 2026-08-08

Value

208557486150163812010257190189838886203366114741964364725158250834885515019937128586837885019914974267978350562669705073228468785192563130601799978391534818460697158740787626678561780319352649686755547234723423223850156578618228776357784474049917909638543946641807068614420415167708823382809080091452243191883018267188189768847019186769914176113916566783364069130654451746266919025483016472744124971870543070755910288479404079196812938477899420321279955256973279034255127372071634154340922431443329398141947482861851222279968237652433604650312553630796040949865325210901860360703290471667109558167860157960185529956030883823110263098787906771767585578171642733220255718402627586194246100330210375733222915862595621383744866388347479005306326906158588024655765834603223380203974831460797666758423030982565601256717107756437078075606581046356279355182643940410087763262790605262499205641064309952298906041430942020243345671594233401659248656011688288809173537086806840252186492263356788955366395648992300575512009435188049961642273582053356942383264860454130679859598192873533411098182340607243587355505282267596301032171294715203654236628150586445383026209689208178350026835591000491717786032970548576049897752952833782067423636665929735047328874534903583465118421818223395361784216695051177793223157542907997887866653772330276027597937472617744351803080272368018852690811568873459507665809216601956093433787185736258055783580636813559151240193033487330705042464774122734046732590615667806748086624349294552878685030565867420801484471807122360071841371080802256686354922013232518412878756131586756679898044357348994681222827786180887179088746740750321816357233908956047964463451339978349247780019021537478437862463355019693493410809198907490148180227188957256615359924903914093864550861632311242474991641437666499005836213232144524272761547319816862402176091441233533504439616146633287728242821174510353011945606145140894845967034961299940191146644739697010473202252454912040738999295060081974067086776302559478303201709463871018518422895057656625452086121285784653702067616730818290246528455436636671477508402696101206550389
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 13 of the certificate chain of a 2,254-digit prime (178 intermediate primes).

Certified number2,254-digit prime
Certificatedownload
Certificate chainshow step 13 of 178

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009057950200 --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":1100000009057950200},"decimal":true,"detail":2}}'