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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 #1100000010595901580 1,991 digits created 2026-10-06

Value

15187695396623886191885309026433969733373959779698932082182602324089778330722831060324499918422434913520133718098696001622313371977775824357515780567642995050611451395592408246116153551708597532539078426670663635803216298021730480832090092526936320464510163723344885161662807018763677827175020825623573874296655324943783223494921670205295788148137520056854342228390546726923386008123848022102977702571326863824345763070323998304145802119792588300066697319128148391664207450767852511693717949369225569888627730509761396289213247506429028157135942041042993505577362111340831489747788963342449723307695759518191992673961211063996045743521452134423514425825129377056000736479799361907647167587428543797738749861209061827577846490654039160867061522970016623023987803293635350614689305117367682940674887548642789644074300961155509241424647390649393491048730845420759767939718740759847865575943251723947835045470707736374999330543068312205989323659805981032648677844197387055195452947023303519309441917064034981022808294104691016962006307204422098721080650941655555340747254761503284863411716041129938056887506136378164048554876932304729069814735983587769250187587361104198026920254446812138777344738519449732709122183223852182500310729290568332081385289605858542865180501728457546302442454192550117190166348533326671453478158340360444422773522802743845942790008445300887718688001487294433083754395556794122891304817696254579187943041323051703806289811592681209824764996527574343206059002060780624277306440040388652283892567332660495348104824921061919978682671609416367015457526297270996275912682694954687334555115756407657711830761420087495638672719843405215404248371890051229574938736218002540541032940404901042892517259805643262027641730989928097816467264678977720011513949076437200884221897585615338228937719757293012059537152628529424477352112850481248962939139179339617054333772415240869871216390798143879262152002529393831398317529622031936496394778919140384666311263568732613568291003868963
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 88 of the certificate chain of a 3,195-digit prime (230 intermediate primes).

Certified number3,195-digit prime
Certificatedownload
Certificate chainshow step 88 of 230

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000010595901580 --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":1100000010595901580},"decimal":true,"detail":2}}'