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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 #1100000008675883075 891 digits created 2026-03-10

Value

121595551120845837996270485505590706263276358849433936524112969942022638407955609761308515293411814951609723291527618970529294406656247264240233945251109702645680006692133838966113770336484468626436122611345639190427927246884595066464084754481664127792679860033314637863580368793718849516956164685937501858550721067738106131414286495890535961128003859679047631864588933546183970660435173853336560151161653316768326815388745932139445902787054188335231824209633552308296472504014524197763230524752882445920524023840479476173698495386735028521407788585612168360394371431516340830867998824618700501272942666077321457184352243537444130049855929383984835610439406601267850840187304476679749027844938746275725178097009879849346584337382107393074011326746040103625619230056326250221799733209971336663974811065772031332486361329415304126621621262237633253196483760501270732770902113139426170189587691
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 28 of the certificate chain of a 1,155-digit prime (125 intermediate primes).

Certified number1,155-digit prime
Certificatedownload
Certificate chainshow step 28 of 125

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008675883075 --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":1100000008675883075},"decimal":true,"detail":2}}'