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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 #1100000008677177798 1,256 digits created 2026-03-10

Value

28708352007008492566062896696099508769076220601243927761067117640944489752837411246639662966594409061099912378010312402009855253734983281395477753990842583186029723450303090901003279929485834838804048739676922252551952552973049902725133265692842256453606145141203686848028950761536403589121803485946131391026970255189227906276829027132697825758376875929892185006935234619906824723632808905913751257388278734687431220910971991056644096444025567331288934793507669298022414048350210263133542149733599951635901165530291014402250985891943993053217591244958411753385429785552775392890011959711717875087936591908630593556916554034956067935134389199271724839479566880943829682043434307445203753219891201827287454206636647355777643250046398632677573685412125738546634319518942375676884846879411330933617536314372883309226646034615744168101279466219485816395496692581008864268703890518416177856546410161490705976747609676475988650215862903069838291222687427972445086154081127634673665088547112066819748391884216536011179274285985747509895329884026316521171587151511814281734393995259902327058966388876282006853746646798279987464969160395194447480509597291477095883041259448874083574237745197329986685319291515230336478079292352303535295923578027110960703600084927021
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 40 of the certificate chain of a 1,642-digit prime (178 intermediate primes).

Certified number1,642-digit prime
Certificatedownload
Certificate chainshow step 40 of 178

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008677177798 --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":1100000008677177798},"decimal":true,"detail":2}}'