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 #1100000009076156721 649 digits created 2026-08-11

Value

4207405938529763807750671317024516042907330264052540524939068935525134247030595223548202392707256630722449984644334479927430888318751836110405349838037606010389746422659943186183207552847481907956284146147741884942497790771151232061691617116796485891496097863120472455419738584739975381560509229982061566414634793771299504437842958718110884956118872077095487418960142241984654447816530550834709553502694009264594730556091560092741076199355460061209568732788597921350982820574968246616739139659837083807056968063850741336696824081311152737297661523735640874946244798253761578556092015339070313439909221219422629716939369461879868621570645729928608553
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 99 of the certificate chain of a 1,812-digit prime (148 intermediate primes).

Certified number1,812-digit prime
Certificatedownload
Certificate chainshow step 99 of 148

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009076156721 --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":1100000009076156721},"decimal":true,"detail":2}}'