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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 #1100000009061970872 2,364 digits created 2026-08-09

Value

656706986201283661797516614836896897471113153420508897907038738925694322178741382899281660040598936001058830259687235311908904523859936618691101391165945591527326103052425008681287414142178627694152824089070860691526739126754484634493320020595843043825620368507051418797331516341280136402574058208490289100029175768322611835538072627784663146836047574903312062869846884876658106557962862687957922527639802587479486949151826283116821734284217445752347126201835290535566733415198118696344338412856236940539135602749743722689480952556497343784026746443732258616652677470995759409345216368976574135528548967122801046818925271044961236460078799491320907732739128041360692174331807129097291981311075625075167927603992538758344844853163692622798156158444080573135411010696549206760502641499403118685741802609975486490922478318500755246475904864442372864605585126861367087605385500931540161163630480977624959260256364656727284307779873038857757344708784594238527315157033452670915733150616431940996282015535805124176908813236458152372903789500409621975783174312220664357043537697452289728328525042732081508916035256285035531504421563838116873887945324931512053128274884168843637174209793325010401423208335813434344584375776320031623020275903465200807410472105860269679948359494363606444684074053068208897723472730437837783178804681711344949409423653413577850622974145646928481717620568641796012062416316042961001601930124716362516270748501072584704899451807826477942545439217401899766773593162545392872972270332163543132478937998803774089510473437513681794364555878415624268017065589506345466865936409835912717192339738953383447360543744482450134459041466233945386747500859354259581646860596777858127379234883057887468079588195720187718024844060470306035842920438516123892960976838792336250767014537841692737052443405418825546806898491383699173075692334255916119205597191811634986251985059697593854784028608305568588713768807848920828202573976486326453056753676064975466874665999773948872757115856211849784828098738931400678596847504853033098946002823170737877773505547748245787709213407484139120143594885459734906792215103443124208515916991676154676830747596414781102495105703794079036367811148265641012155800242016618504241517502329858959560820467808791254285416673891240114907411753541902516443219915262336748671494930256820078276538818716381694967883169847509310891879
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 16 of the certificate chain of a 2,563-digit prime (200 intermediate primes).

Certified number2,563-digit prime
Certificatedownload
Certificate chainshow step 16 of 200

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009061970872 --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":1100000009061970872},"decimal":true,"detail":2}}'