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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 #1100000008729256629 2,172 digits created 2026-04-06

Value

241315761462261618939244481565353512187053250498796730140174650817433009080212542856488654574001065301584326517748893359981025110489373011779876829107143166436815213431543609712572502437540404901904971859427047782233986775048812317502249161944417251126400912611682171445300744067042280991321853769471972964946532201805519674066669173863003615088105799608614126955563782410266465205945464744091264036454834537486020241472498181774745068137990202177921775484602754815954502583042003210489225691278973208849800263710036792487940923775316381372453254615186270252885220366282899593630684806900560526147117188431249950384427264673527168059735735708944588020334597057054747248904808365920532642955914280974853656442855422150427040471578181753808808894986262597382996319621000635302717641073235014324251054060177003584333600987396865763636558473652570163699673774166892376091367953070100041650414539069281031388422875192653824270669466878287910185244166377272557514676651458709034503331794886312442693330426723997949356977320583699988867097308216606663095931079367706061783254487779396138371002696108286985444194051480232352844993750062322522405198053989558435043549865081311532762790800172881527895078378451772943396203846767606608296666762840987354130483178484919672433227214588580791977257712365657145556988307616380837964867307756497411422539695970734700894324364965498438742822571320550469268020174899161758710803303890531059530430557094698073975877534397819179990707100321654130222029172242397730706354150090158033431368085806346969364044664502836807024451216554902085710032042249114636639171950484008336257436180439030771335493762043913850429029042078860872759165382804359223689377211268268235060772036976918623178218930563719701110454519413617154332943762364034634546600179538119838340169312384224335979292770859236858776866344607544250212480069182168646385826168074624189816626169531642106491417481189690221946575287919839998670511278193427254027510778323036985604819537368351822841069734547215048010286325181142485539436322485490851988825125216135578310557130839140789555231728916879786242208061709030818038740114600465512060876787505110125057587183812106569549260496303
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 48 of the certificate chain of a 2,785-digit prime (201 intermediate primes).

Certified number2,785-digit prime
Certificatedownload
Certificate chainshow step 48 of 201

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008729256629 --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":1100000008729256629},"decimal":true,"detail":2}}'