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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 #1100000008678591555 1,643 digits created 2026-03-11

Value

28681133258082769451143404091171508853593823173557418958395361330937853665612986762184061495179734880927287509607920663144871555413454360744622791625628337264496461466168856632843922860461574385526215551466623527488649459166056613974930870822098245495874695898736094662700703110117912669699714761122827953285161639589020987263866291594903844644820901985510125018767322841465546874833352296183744033530105609525983713038343741260462621594575991727377177567078551359010304387499463820305174695460861444424118092176264708002256283215542836724208744286790449932659982859494199194611031814254798638433517164407720404898013928806364978605141510017372924443488244968073989875350688488974983676149355210165233846314761817409143326118259767662169437751572297072849441082136853416022565109212813283318822229617925758454597418059419814005358822108027252077126852628052067582289351676151577557099803604073297772925130106000608579371341259811382021682104110681017187746882593279412198522224820873425194673986341212950563861286589683003110604032163409299902291310970755420201868512095172468698419709153090591630369984593236800153696160480868802108251582336629135295735371358134084884738736697934794736303650787985849439208459988117896930217653907147068439739726809433218714798658220975741724865765644774758047388244157972603114912358196260684582620309467316756630194112279657278064579193551265539267823748107470703627934394903133381242755028272181424648064190967178263785585180809382985633637378980176585842749207241146131550257508330497202745861065347910490647398052693174836472752763994519495229650524130729884132674978230876467250776194122189851153568471
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 58 of the certificate chain of a 2,464-digit prime (171 intermediate primes).

Certified number2,464-digit prime
Certificatedownload
Certificate chainshow step 58 of 171

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008678591555 --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":1100000008678591555},"decimal":true,"detail":2}}'