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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 #1100000008678602555 1,359 digits created 2026-03-11

Value

141386378561937434681460395745547800821607801729914914965134236153875112715507802553367231433205428684688233051321676712266987324925297715970124185534709616555134891843636220258492526165783787243767713061159859617531931425914719134967624384486808526001073918189888316476724571720118537018527491175941562363597590239759902594753661760397192900240684194172122521955691297606859399069575766128791954656332521931296396330247163809703609280636829600183808693322891996619179249838908884204581647124253383851381500267262361197594872803642519824444240243620429967768900947789142028715969147290412886228245099010599783035646445175951734269649733563537079373656263945560178295771932422404139192120560167394328563102691562277883067886678353452171549653048332741315778103886932158356467433249562703626238664727310333372633651504227138693948244234002125498968222075709941277876238611086958500472860409602149539480283110940055041727635108278557607760299925230040490347393510924086021762133032068529607192250345301452702406498425395167799142537817387908955427270835498990846035074913989521282133509685971596610671870229345333462689786985276663150456575803659245156814746021121424133235722288179766515933469598896578480150017193937958421316251655415691208756735978993457172761638698688585036605823572810358421669950325686192859420201196218210180477206618793647951209985809639
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 69 of the certificate chain of a 2,250-digit prime (156 intermediate primes).

Certified number2,250-digit prime
Certificatedownload
Certificate chainshow step 69 of 156

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008678602555 --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":1100000008678602555},"decimal":true,"detail":2}}'