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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 #1100000008787269866 2,220 digits created 2026-05-03

Value

878604396876287005040383985329188042894178112105859189629221959191288002360284883538817371171295398739564046815928584778344042391386945357611100263660052574991758086114786034513721092950713200270718922010195493872468757655618555059018553510693207402156972343172072924484088949393296815426500413960662049974195990910960811562869379763536804598929304747248821538026621935130338644901941384796256036991303535863278244328921906123610240834421137451518421977630185244620325396624875686616210603662442742667107219261881560071257175749126497151571259102675192628090321024748894846920736059564841855467442431419063762722305566060657556383293553944012065627614396201024523024666725953993209489684500522632685617288034218285809069154287753874567488587718419308229327032748997802844934644771892080251221942254666898052886360604361918853439829600891425700039037987996441532739426619167996594299404561900484459371509415575164350005508817489647734002944508979193892291334203641907629086863094548043732968722405405371642908180696641535345057223457021746640872457331572828883137170996107252743112380487530148392085526981800552916778027812877524173720893789365805178254140529334675029330621378835654708720268805096962498591461027959182045804742568008974768756833701459683522378202969470458597592096255977043305670005762651736239456944194284240019783680325318692289855743199512870112620295540108381220971200961838811494501489915115724388907080762084827190461666438775684137454995238066691025863087662400669925720417432400265388196985399055935980107961993571057255130528484056425957938723533941724880227075032654775149915725467854493668782328974139245156210723063603462253567251969141558493170209067330011710814643782133892751346832158693860359724680794930635971387225889175301157061325721131433593738096300676929731039892198047711199241805427366287546315096466767461572861964382191442632717497314585988644117925860370761579121437276674183742136747949804004809070349601551638227480352264777407466089196618749252952655487135268779801581770290587256257203019531746406360549139150126682247567009170054292305320132940178358209274534276655195475252230690057156153896374159178737726228712556193575068079167163798040275939903232394831724209667679
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 64 of the certificate chain of a 3,202-digit prime (195 intermediate primes).

Certified number3,202-digit prime
Certificatedownload
Certificate chainshow step 64 of 195

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008787269866 --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":1100000008787269866},"decimal":true,"detail":2}}'