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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 #1100000009056420865 1,244 digits created 2026-08-08

Value

15915038092938934804221811089686581958170811814085136811873186054374302756869179017141085171659809124560484108690582774269908866595861779985901464935347711767911875435424746996104770589325006725364941994932718126871769625882086541160245619163907778012131123731456026590616022474216819475177041608476116977001021002414657616030360182296937254190513550576399269553067309836916240099112115086578618940165398864574391275375229989537695799700580632672015477820385861653908523147142588798429302179661454719824703779247820008284266341803542849504232090654905296910303212361213621384533830576532213942679792910959315316289608668682474247334343865682735138789639986212077261126304753799142870632332281230896817728768563922207285649231518557264689648359356370605737451943152403491988946505681284627579652943906949234677627442929306333140719970789720781414978471639870665872616225494470654630970613238553393981448967290726158802142772506657721993236906962350031929918005123896334564661783205489814492891773112053340786738234547828482404709217713461204530181373659044242334758947943667551468529396877463578873311469477247891349285609705721262612431174014228252977381304642877928378514491154170305412380024869814313724305825847748463829326444497563252769243
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 83 of the certificate chain of a 2,238-digit prime (170 intermediate primes).

Certified number2,238-digit prime
Certificatedownload
Certificate chainshow step 83 of 170

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009056420865 --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":1100000009056420865},"decimal":true,"detail":2}}'