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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 #1100000009055621673 1,908 digits created 2026-08-08

Value

284351975788403859718865602853660067813947319174858125231661401813653191598136523672451780119749846557951994091108312643509294232420393904105378490698120468387335064221219010356575897348348680700529259401054844298099029707477643431031733881885632906786841647210578025168141371352861437732352750987415870705190171515853689405502950399345084285264792744972076305781680513425510092428876505925921966980565397687481527417774914277443416155989392456514245067384308475961481136612683834888799301186882887803574682895427653549247646608746226916330576752167658502689661055431223364914489544854300392962320406201814963870417779701169523722263671715583124340019731523658988876526168776032761891221247778854165418490774502706968384518085722196990980007854088000235578256278146095470043235613830282687528402670740830113790246683396955490835515207653059049902047568158355147814024035772365225349121653053198246702020053687829219446492387821567155945022941539688312047478629138891392608162427412004946518836860640519182142084119276533863479462809059030863986435937917340875481679637256323775521458538090890090481311129862212967099751750740850046505168915988284601524200201677230234771018055392209831807709710857108200327654829779218232921532803988021223382400276024757778596606347453889375539182137286365702773559100278657406603066648270732180943659435135580186104598753837990009470045524533429259158292091865002381388067063175113709638039715080639673173343454452433223351283953394709835769829060602459371056019359516259826515754647363361844726739979613515316182919165638996631586199695024087426291579849407215548265356197800877624766061836933896871455802322208937557603004263528012106901757265440273155648722250249811471571148869515792282192349063078345251416689674991188339334224796830059648257998508635543866990822121633912611140672708025304685678049929845924907730240738012692481011062683490023820716999506196164504389
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 40 of the certificate chain of a 2,423-digit prime (186 intermediate primes).

Certified number2,423-digit prime
Certificatedownload
Certificate chainshow step 40 of 186

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009055621673 --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":1100000009055621673},"decimal":true,"detail":2}}'