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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 #1100000008727412378 1,916 digits created 2026-04-05

Value

16575831172104918822547073579038438143898565032087351133283139077116062921404220506458169374204090020321602255989498943249279123522294939261907066596752471005410303326436339469516891563561182331043443912331644669772193205781628900156021067596449770921156907238567073664817694989922521244648754315359728851995790705031585661793288917873303848756958096621061916260181882580164710058790326067227395309157056367690604062743052176549401316742968241091448673553153812949041827909698329531114624519421715100849186053258219047133498879723772791357223015582950943373515563270714123081336999574493582244332418436968056656706742760525546062083750435191713904806699186482134596739317672057531319449356740996476240387839546079935505062284857960688545070861997678655188146407992724619667702164757441225211661540555157559225066233570352992063939183595003934222759268343114365157927700637968371149994869255085447025778767069266789719555195431330748783047085730378510650433567858991498744640898174951540945729307899854485711231852330147900842639827470587046054186177942637487203109059156831459769783936184346052612892456267053372129151644318805233556866600273847077549249552074467234199661392652583683355335653638498497547102244946171155598202818282146227643890438364217045463953256278311977806210027547226135586491750746359620183687458176692879503048394140812694906288462510114007770566959770239614959664547772703725469760197600609896534513312116095670692423565352260949207317836339706505757409187904037222021145283845742019202874860890142377864427416297089887527639964034367553460605274590993416664948804611911208088725980480748546166745587430968895539285500421023153050058056153578935424316958526902870366198235441944915136085940046680774508044837895243509376408517740397376803684810874753578732536740819617912530637480438314583228860428799670295268042568155212279054650003887895179166745699123026143522497944105453984971868418231
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 91 of the certificate chain of a 2,772-digit prime (298 intermediate primes).

Certified number2,772-digit prime
Certificatedownload
Certificate chainshow step 91 of 298

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008727412378 --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":1100000008727412378},"decimal":true,"detail":2}}'