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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 #1100000009066571407 1,625 digits created 2026-08-10

Value

20479563171326211608358736550588629687619112487696022341276962864433189210743701254054669441992634029014922272700350791938161775423662914926252404652680889122736766187143904468177662820535311124327662388685075978834549396457974482458668882191367520522548988600634164827885436147492097417164914289744323419662789170575365437583789338171516671973529767592818003429285904608174245031670702949820927445613990859942534793098491363413051678694880466206786146540504208697748635213791444146506929170710400647387824134886001092593540987227955817484223528450488308376160475238401398921520061655102464247726755494895019099804493090057715796371098729991703639129531075680232180069088113203844093496988470880620390627671046467497860520088061826167855657863688217906746455768709219897803417547754167908913007158499673902122968173544492839583482324877112777695919008485935574136309114941341101347144309853462864113301428628147445098613962242527203780196778561881167713931856502191673568669837715794512478253013160173472408102167594275056542640517284952617328114594335410438693814678109387381553149688334156778491879118040367597290850897029018329902977570866825950142568941362635632291201154910024233176777984110767954461103747327773646506986967765572420981736915760124884244297523921251595704284187714714729685602995011194735485055182920906995753102122541684866937653043731270437939972687142190568825044849637941914110945595930139958888792617345470736497105023522025111247135042670454435050677965104925969085841490464237591634226247742664201293051322506425363654727243123576815501853088067294970172763218752568016008929361123953019336971753
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 9 of the certificate chain of a 1,723-digit prime (136 intermediate primes).

Certified number1,723-digit prime
Certificatedownload
Certificate chainshow step 9 of 136

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009066571407 --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":1100000009066571407},"decimal":true,"detail":2}}'