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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 #1100000009053516877 1,197 digits created 2026-08-07

Value

256717421590090872485820697709733316909572561899275661497264839782048661477522920922002556493470844261870641150481010376288014015684058196737194682748743526168553805779147015114720048890063582958500221024651235269866057735467671207580849990650305711880654577977536439689583194163357660640614039634232538273416701191653677889352012157034135128823777021879261548862472765432047267121104095339694106633608930768688968630045510204156854808138747539722851716380630611191941584498635048888850661147157694009966652491355899888409060128228539798123069054422290534563677584575293779886987574807965924429408368804128941281229273048079473012761714345070960082621289015587220727833538758908512859077600332236641403252280386083295707747229914638556582995867651225299607568718790610797930480164443637878784165865282040204354626634727875270149519325431466479799434401386013399325745099440006895355971476671814609283781147222681832358565484270560542402701902866023917045502076716838004639854103174903323330146856088583399167250420395967148546777382792257699442591498838501580337703546064957095351861335440406803389279221419024785297296132708661738663911583015339155549881046424221386826023297951418918095883694477
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 33 of the certificate chain of a 1,604-digit prime (121 intermediate primes).

Certified number1,604-digit prime
Certificatedownload
Certificate chainshow step 33 of 121

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009053516877 --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":1100000009053516877},"decimal":true,"detail":2}}'