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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 #1100000008727412212 2,047 digits created 2026-04-05

Value

1571033783172879940099944438973138958618862671006289467634336185631977039228616015059284148343970928465473220581261892573011723696060790551943426451648564213772315108058461323775312352222878369434937296323341098701253039233006374814733839287107070635925357142843595639984044051092507751334830097643668736353286212646221167142696807072932551664224763637225313572781672311887179901479625282874733621769578051148144219251206000359828270599645657170880078973236794604088666693944234535679927124530707635344904506078046942027378466714441384411468333706058630978182028913968649926937598494111350799557142588335790823805158226370563532444463954204910216270362253385077602691881128561770993501442031608133196923096322137908760934813172767849493932087747296175154316668165745554220153606347329188113802281392700763680359480986358643551893968656531830457145376877257090068690546713610412435125259310121918588126853226790476481037075995726489695527741598832643703305697828845288938436921160192820541098001619590867713283953170837228577354912252445666609315064870227222769132900519911375820498760877309373577742757748799817328317355310638891380949643862506035936247086232616008133555234557009623566742985623602222897541746379859660632760939976591629156146466445495535443355112458513393305687907538554543838420792520374019990072048297623593675316962538731418746526638473136122162289560425693717773606801599662479696794095841309085020848945382295536401302314363590765259271650402859193728471782844813661586976851829683917209975948449012090845029561945306376312712350043431711642525748501301000523947461061516208369041583387006424347408586536706519816134968604972080858712135788031326315663908450215148674406035540638123703731160994330223609441288928082667933130695558134063650031885222402759751314690470106113943350288511092335875323771010903500496971686947885850314834222017946925686061679643306203885275250578624671095982754868299625279711680700443504312230465343522882066492939882524306584614492399908159672210611624692370990882357004637183066914118600321287
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 76 of the certificate chain of a 2,772-digit prime (298 intermediate primes).

Certified number2,772-digit prime
Certificatedownload
Certificate chainshow step 76 of 298

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008727412212 --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":1100000008727412212},"decimal":true,"detail":2}}'