factordbrpc · fdb
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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 #1100000009122751721 520 digits created 2026-08-30

Value

1877469655454060398891344146277178527033192777805168765214642976740166768706307434594223755469688759185757056511890603763524606823048077133220928446119697497482174108511274755419057650016744942968563884659229103540607377679705685892656573603381718595702660374721129124549435495647235229257507108798515230332424553024573561175781014356645439185737759406354648614418139820617489283163753804700295900952935426788492983907639033462181558176034709580309534725210776766485258411461026339447569152957075282383843255023391191151
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 177 of the certificate chain of a 2,256-digit prime (240 intermediate primes).

Certified number2,256-digit prime
Certificatedownload
Certificate chainshow step 177 of 240

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009122751721 --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":1100000009122751721},"decimal":true,"detail":2}}'