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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 #1100000009066857382 1,541 digits created 2026-08-10

Value

28138927693758695423779862338965511131463162813302040125224887460053941191835791990749067725359573004717544176178283709310883871268067745112621823263452210405241265517141437239835621211067209270172144561402588971959246386698984552744336447404857019218719315216732955969439352046192755999170485397248726727457471258416697886573985635735472045340564148687281788052429989648033550350355091466322714986843799135439574326106802829700433904519056637786748990716492033095252451794427131463451081153587158525396984161196383612018501954392473553376083383230549522725768007490541276959985972259780063258203018531562194697214302354592692214382180989081104129811141323474848858722458621587347794501522266163637417121467052812696337001385263087510763276577706531689115213737434048253198171096514906461702109991114639343529705243119576578316952902216718665808232561835440312499395634862061154655199171365062869815299929535100093022917151825057793677845813468878446295680483631292946226995604488734608294473802226704374395984473637939813305514112743514900824086956096714757145926358597067360862082042938211961734955306947523044904733375039379591126046817354551925132851233730112835734821631706791544308103303416212812127008613686747789150209249778614478732018236295539139435099570939089169304054331560302369125375624474386996342022642309759606391010126356917132505723540553026438172635191961254681048223734924394342156637795953744903730972375706682998688639060461693922035222516955460588558749317334492280272116301963945170473909444286466867130259427871549
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 14 of the certificate chain of a 1,727-digit prime (148 intermediate primes).

Certified number1,727-digit prime
Certificatedownload
Certificate chainshow step 14 of 148

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009066857382 --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":1100000009066857382},"decimal":true,"detail":2}}'