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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 #1100000008787409621 1,911 digits created 2026-05-03

Value

355181068270438307320261864515444785378752567671868431155577137120415422031384386589615130309056499099195586999672855217997000708855661072667251078809999623528780356139274987321974508528494641882422615322402283628327488185224350908743746781039641561689617558239835405854870843478062493909665190439560529457182403692199313302763203200987281561249768567264290504557095591454293993081267780311515879980878002524481786972163283025952529611316810666919659562376494048438075388969921733130905988578724359096277129600543876682085385164485295053776722814161356349384812759853883249567734769712835863459718379684025347246738429029239124408722527801996396962103036740209039075248545223407933828904259200553973952741139341478307672968677252765107985350276642374551272708706346873247134663629727563166538129402202998440779075027552740428751923974823786249409022624715347275674086398632661858026378376341982737530754453165381820902938874672794630896729899083325266658448501912873421756801360261517527621081962889950743822074815235447929231837930492291165600030272259391801176545218795244895260419244768057258177190217586880711598216262938616365073367224946034162276432294028254480389436930148468170514689874858731186483288262749504923375310355116026690068701687932723935037189024352472877671881988875964569835280677674459193136578577840679260081745396723761541417492482392086629807215694984062847570615335724097057886884100718725421426547384274715703488827162066048793140688026920742474738544207076077569795182613100298821430592765212283952312404683788164991760768876866502148792140440563607478472938021785495792440035237246065628158158617120238551843692574217349944218878139632058541761946822886979319362069274754542611993947063052377633261215593709346647299103594247147494517215067186247367955687283167109068184335400035273138177425680832354656700700902677724000642409571085212405428493158871024833825911073540927226954791
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 86 of the certificate chain of a 3,261-digit prime (192 intermediate primes).

Certified number3,261-digit prime
Certificatedownload
Certificate chainshow step 86 of 192

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008787409621 --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":1100000008787409621},"decimal":true,"detail":2}}'