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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 #1100000009106881817 2,528 digits created 2026-08-25

Value

28015415305927416028841273806987276911113097915501702685742961633004060715085185556599779474652830073251270721255440470907436512842092503186867734433829792672672366649282630418113034733213208536501081847357629026485013071735205005646978139358606028028304538516347667099620994132650628807146498195842086335440284580371338311233006184251255785835531952709987334738520975355344158782385592751763139796243034897875043770574242688594890369475683638105669351688604085452656626094470509225874247623513565851682487256724174749938903142724588249057471327824786676239417918431291313436405700360258951136327500183847270206182031343817488774982577468911551995151733557039976398769067901270358868674606292951457148123769681404321776309322427096778920556946769420543787769469866928590940961982500481240133622191444616782255984912732417448334754827648861923530067280699497428720099597408863906616335299226947046508187322563377962175911904123198930246655173057852658850241888386984173703526719851507535842770270811937872625564366781345031785326422120402407070016471609406400385666110695678355875933546850884701420970675808277312263652125402032988157621643043064958278533726256499814502767479958877286917322004643206227434311996970758997071492070624341001424866668533986306946198834918476308054613851689558678667533979821221968156897010230423807991264655427266345803952453687561357664276319026016544663943051400764021532290358248446342746880393975857824689244517459228685441584271227059916391311138577340046367931275997419632336430195999773006523360288727666109338521030017221829708660190140683174174701245450824791018881263027523341849791129795345235082676459058370532559071413785925151412819269885160850108747548836269734407560140804175981048661929705048199743845870110063813936193356035548016359054801572024141896782324637079750548317599292857973229094897094401940550430506014050363816943935356603285225404159295345979226132001898554138354279993924215521525361414474999544896720047277410071514430534687841409731062348140249245622497911569125418300380094374692238973784819325328275929306394035394390796666324759164828577789795665171923079790000585521098600113245251244766051167307121175595916215351967920743063302532752199692864904582281277925241387567157033204818924264269017831121349947288605667321205413431699577042347832330403493134906666354707047923982430843384949138686916490970907629881332909391183385287589624692021671573526571197374339348751859137710754365000195247939400147865816554965958822307368728501554248056695672965276432860457
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 38 of the certificate chain of a 2,996-digit prime (229 intermediate primes).

Certified number2,996-digit prime
Certificatedownload
Certificate chainshow step 38 of 229

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009106881817 --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":1100000009106881817},"decimal":true,"detail":2}}'