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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 #1100000009060721947 2,354 digits created 2026-08-09

Value

16853874084701467479472121355690167823159518765091709501623654224638816720417152922797204457653546394090310721818076862762449015905476248865746197989699288366832028946406610195341165285732399982130966346312629712916112083714805064365630887550055909507046838714774177591393279140721322880234978224777601701941678627033625995724435990705624772179382482930358520326467269289388758069124234042630816655608160333411642855817774336289184146906888878055417080647389599042981140320151666464232687439226706067589265504168123076149085883702059141070552377168430870712698634741604982418733796041141290514700785160975574342683286744107906928807589561986339710783980222095556869653485462119543429920052390041392058305982263842139097910775268462176985915719479500851546113479678893158882982602472860355649183421389314249776082425987149209396088307126983519390285636066248611961493365895484077773562310869523704279518678041276189830209367413016511357892239446336280368441714915952872553690406283686035732383317591733170657115405929830248769714506911950154507119408070423554010949241612901520100483286148188343368127500211552254641772810323290811393261116978752908312032971983606265550904243069303943182974662776386262107114599089248498327200762097601283297467372148882056541845673659511893690436425913154507134498218467174467557679521754466260263953602391494916780384952587214379736041769212180174808117668907530450672271326728946334173623995396842743396384119166013646243260267538459315089092824279181940969117208936307787996462999308773396516999674547552667882507538156014745085859051015060111532205405344754017041436908787743382503902047322902689387642818916100280634033292996370390558861365663184111633103665980027372670452201761351953663727761001549228411530557769025458960317542794468999898091188169218255155501733008232352763928891387906304968633434691434672992799706510356148267638079605218927627801854797347652396271052666320726545364055409367429765678191141569905155652112264569577503510571554504439898369430770429498995288860291315555342825023482207911720050154707789926109525747850381422215506493688591211223264019874588401406344166840701451851858724031023111218470728206600366412257823283465440291016997898143978452608801705295766096767220162256010576049260561232501966363356119218460823147138011904809316066862377735233359459051350837080534087002174886381
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 18 of the certificate chain of a 2,557-digit prime (187 intermediate primes).

Certified number2,557-digit prime
Certificatedownload
Certificate chainshow step 18 of 187

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009060721947 --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":1100000009060721947},"decimal":true,"detail":2}}'