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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 #1100000009065128235 2,313 digits created 2026-08-09

Value

421075328952143818914186527343061032344246332452647826726694441936875812630513731713685177950809193582257546353172099854142319554995593897493946602285249489225509771450833014539508199933730402428591378902989067810657959952982907649061893089545750453722562833409540380272307444273705968396785662544447203557322414626568874261180247584311819303237250054300059138328049254124886424731759194854803040433368487467714915697094596281546829058741167265121208243659381552208112548398079566185858486889826076401661844734943388689056906276652360259631399160844529874016935423551743206464980221795937668489724388677443574953584151870282533111625372763849654018054968943970094082789436090116979743833959478933639185818063574322588549089531972209870059307176445090203316404932181506320306070442157062007397625840302237802237288534644324930158660372724959857077049688717480580338974154052115531994935993176185477253878558284350220855528286343683567841362693461676637792944495059712122248191002235389147665680261703931565594930103663818285578215125020169967124943061381221911590413773959903942352000949003324220535665932158898356616878242836895088090199456598191433830528805882076287089680281176183925704860321822669372902635037112956393609366461717577116302508929828711894860015278301811807038228827598294164733128334829726404770970816200143011684012692408350269291190718321490259262141903085110064572943289328437525734861364342040313043705604105126297249597248216370597566890441986512995030767988584034016473957863773915774252797508426892775301639039383721766926614774901834392046517447935171956530093938698676119820092764455860984761622240676247290751995145894586966407293387730201031318742457137775250163651334140751153591301075910029249097867344579894716998392029442765725709622422176821838520046385090160772155015608995073946262165476006459195407069090330001735749991408283729269469455591884442176250569168704463976507076380437389444637449462748207498676139060904423502665722885584562550218278710521662366166850271168619621873181112237663283327203367421004525405366005933375260257603220840459465928745797695394000011357628896252712819531690795977629992835341754286456765988706702886513596278728774611148962594944064083415108574874595024968370891189519112184387271718379470947096405018242513197177125057220205414434229092231
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 16 of the certificate chain of a 2,485-digit prime (189 intermediate primes).

Certified number2,485-digit prime
Certificatedownload
Certificate chainshow step 16 of 189

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009065128235 --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":1100000009065128235},"decimal":true,"detail":2}}'