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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 #1100000009127305896 968 digits created 2026-09-01

Value

19859850719171121922660857787436072889056009561441673307785020283706411810415442537556838892523481150493724092439863406482751715917938793529639563646217193825099535461987433256769230441225799359311768744387378035253326781383179336096548591019263289006093308174681574513159171630323406166689962300263230355677159528814259239877680778128071740356704603795094087451897422477175901850661649374837142871650561380720038144793660988182846392904592936561460638288119515101598205599964558846069384082615067687466851649241721738139217340654991846280169749597324357007492328068431813271913371092191048761040286694412861853130599187474594733022336630568675918870902563497516906439565037505104827524281472184440538814372396686538841791922311087629233561972634863036195518466500648803855484080922590170950346507702053094974148507279818369042046888482251104417439039563909499108778093879291984278109540105340497436917473501618948677293110353002620488293456098723412582753624515127931
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 215 of the certificate chain of a 3,105-digit prime (328 intermediate primes).

Certified number3,105-digit prime
Certificatedownload
Certificate chainshow step 215 of 328

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009127305896 --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":1100000009127305896},"decimal":true,"detail":2}}'