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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 #1100000008787409455 2,272 digits created 2026-05-03

Value

1720811951322379955596541764600823510039316935459505258030197287201222017771722372992513449562645487821158970922355225575328625624791755280032256271851484598820280594540630046741059658742009198004104405466723556773885427046057405157614111183948813091074133931924301708357092704450899434039592195041542130911786791765635920258133629271667753166853979259737100133551148578815566015212447940486304733116003160146335145408623935881852581471160634305616442735680673535396968411774392736599077726377377982665798558271410540770209137903317108367179238013763996976600392992226040916206417947973767267900975427769961187997905629167920573049556747197528787690701970964396539240826569031288808123659788049911476141776307123458377659781595211273694557349565097801264037779083327813005435736055656301259378534511985140749985272745050333653701223711800734891004724484787056354594293042323917145079441234489339082665553396917220712760955037529753504660670877477774304426905586871207439025752646558271487037981920342648446408946552468061917794619830165220250660335892198224543622342267770042940493366002127312285905877661005057364531656158819872629197840155853358001442595830800420670143118535708478529783727691197416896845305459225170582378624661403980132349239066619117635305485385720521841062285550409055851288851303223706044326352598705342061142155169904534654046130063017437367419627632627039891652392909596895575325596019675035082659256094051857647805293379405683383023158379733892354715360466852261338406845290985503915546663970931111323074120788578754424128510236928742803599491908478063444869967894606923033320146540350461489126807176485736100172039438437353841954433840016999524164817451564912958927640794730808497913630611813250695432017948339170844448989406947720108327146898975018829185034537265489180673941475503209532373230586825878429246693542517778922289479918096528989967644103428903918448254093027038967032273774423296374621368384082878770305843738596864919098680359619122196398858449390057257930672407264351274886505500730586746860894780208770208655035777206289604092000735446807597752856598036117210450068563066547030707528673946455090123700492344653830208059673458508969462059759247222003330688316049710343832393196676964194545880540567648511572136750967522518247873
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 64 of the certificate chain of a 3,261-digit prime (192 intermediate primes).

Certified number3,261-digit prime
Certificatedownload
Certificate chainshow step 64 of 192

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008787409455 --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":1100000008787409455},"decimal":true,"detail":2}}'