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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 #1100000008787409445 2,400 digits created 2026-05-03

Value

219965875253504808336700405811728255831812723278021485089121924526124731507617276756439275332210935856282794446192293341534320671299747884367540114391855607903151189498109690046727346040408388038853226687895408470116959116880272939277100952842176675455325051427442536665444375585152359146181176787877803871332142685584004410423176351338173914914227562132711441021822807965063148579410974330670429609142153316519256293902544149760634244418279397336712401724829477390665324772084261925725600644768427360393525552754570726491503274827801057126382200780351169421608865515984387283756218617254030614683068078168658363769118969270688565702705616546702473184224001404294901981172586380158043741031557958193719193885056253132190258297824073424062425786698970588727207003819483255849997097591462944169192280072698260484496076931667617087445303656995478079229209712618665118594378197048363938163802075050258640051454875090778747818919346462149807517188402657204706253410964337142149031419287547761540174728822808320198113200645546982250584782620955537670156981371075937060306626143050508315539579032220584808351965524778551979018494636058493362645929522627075052461545237298956916854526840170436800620879486720888743551189502146375079947552302726427722804259876501384995661940354379952863270407392797151767275927306681008059066049619497465832988671449437013890970232033834822985480248015955222575846220993702899745896976447480914810509573805455913325679925016445434292856209591547983856199010816385725503052700050698468231672741717429183548905397306895089937247275439963328137192085473933858859884469083056742988550513631952509042365763827208360424082108695873723448935451059994481066242477270635097150068446562525537226036058521428854661155912630333818740732079081044441775907673007712689198686563888289535793775247766521208386375887610537643585275143867478078199675330855014789559258113103658287175752241756679801740594490359678553461346111776139365890135027720915349554487997264705184284834213837504872050323031177442030070835742746425049776988486001012315934278313772939359148540732006736459172948203232818639483946187658377743649338576176474448864259835785543172051158162139263444929107032548601969324129124252009974871160495879004906477199960873629484988569210332049432192762701974876319259554395210630476235436880870166157141826134363023647924741204999832619392331865834099775684916388584774247011152879
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 55 of the certificate chain of a 3,261-digit prime (192 intermediate primes).

Certified number3,261-digit prime
Certificatedownload
Certificate chainshow step 55 of 192

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008787409445 --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":1100000008787409445},"decimal":true,"detail":2}}'