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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 #1100000009055780981 1,981 digits created 2026-08-08

Value

5783688901123519257174776187799623604002970145037903421715112111765717967424509636476370372495533470936235593743203446437426242426012386277760712906351774772772778236276968034923015113271557868336452457690383801707499043093861788730119408892782721613333605953215572461691880751730453126897584580611406101683045674580710951159867489879540863053306487245567151777850453370539108246695449736916562239860425552913949004871539458628928478808146984523827646103413264447439527912163392910536026539204770629990918875461544746721665003902050462655259225813851653228431035406256358683008269047501012005372065656529311475537423638999831634890318148666535299140545065704725676310112886055346241247399641340011729090985301514048740617328942789328169137181676302525462911530755881641533759384189194810992809733129244456703790135168607579286580777925301500812211599755184279087021110558018610485230114568194877555090892535425249831800070163330271842216307214388490064316873381379526456392384295983903505210688969145589925735760257645874120107604389666053132020496496255665394215828296764145739516615045831938969789448412738430692662623651185553929544031495625397385352288083131368527605669641005775041295392198642442610399725575762546389223589204629651091075066091966535400390737729393268880629118632210010489174668765320323063307138084407297680667677223708654099217333985869877009038811293631995065098367187870834805308079746821493165455131358001851725877682750814289266045953672181924569292325001970127070882383309677170303271153446384919813681568783135289280598986790866025399367971411238770138612385335258159932366016020824872161024017597186076389805897321318025349229694412294050007166694945724947165307410374221356828548435130105475585354332060368257911255705800366750172684802795472686523034728539936506435215671720709342423323519612758959521522364932147119868349048548095235594112048836900525643045418939983534722409961498402159754604943804181160916963060915488250031999570041618735194089
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 28 of the certificate chain of a 2,321-digit prime (178 intermediate primes).

Certified number2,321-digit prime
Certificatedownload
Certificate chainshow step 28 of 178

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009055780981 --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":1100000009055780981},"decimal":true,"detail":2}}'