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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 #1100000008859756775 2,065 digits created 2026-06-10

Value

1687282427705691789449301234360093948645589482356526605682087939461076491777841733292361234738661096156823217329492335492001582626700419293475679496253764320054187192923408384187140278815287029563790249604030085403827666467361266258112013368184362411843292380794788620097389248729366454966876446508969782918855011270076306169997438475599219243079323967675193167462584122330523898156024863906408221093370302488022999545595362835058661636352443385544237595199897931969274665849708832181675241413694112600365302642314455069734231836707196386333690132550901234835213395109922744251567823103640396594553706494708373164139685065638266102501680828615248012442354286313478526487623058979390272602980986013782011107003853346478769415758876316410134174718363359921443958302022513003169413515384723612688537250258758006843804401434013441760491777823463933560608742535399512734903509317778832224928540305339182644112293170002021509480346784507183905986202785407615731326174762981113525105214330957202854334199461035426164538809290283139823151618651594050594080925987398187341051044131585009558575907827599822682061152823123633556283107600726979501622899635598554624816099641949780717969162658806752509895535298011216453602638411115601712926753167083266843520653031409998992109160577833556628137984465189279938415769889980362908540026198489290475339758047465901949563883714174199976474677407980075507030120234005354739766425987460136583042408605450984993098008208378951920275777739250105447976153059163435197776882708634058836872330992322333709545936005634093160995466284368853252000187461770494568424758405211441334766788671730304583974919999953851384008481997988967955619841648908608143094840454081003866047730586301896793415646716875400045883722136644803864003115328545663998108218682500153441508771234219793624416847372608701394777912415655614644898449354847716933124057013557206955191695692007266055099324731279142582110757763745809115482272831484920602002134726456895212105785863027431927566344101080339302878974365313967964547494746470507325606783750102547856928592886247
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 81 of the certificate chain of a 3,239-digit prime (226 intermediate primes).

Certified number3,239-digit prime
Certificatedownload
Certificate chainshow step 81 of 226

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008859756775 --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":1100000008859756775},"decimal":true,"detail":2}}'