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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 #1100000009061638411 1,111 digits created 2026-08-09

Value

1856403671370904234988834421548596450577959088834548221925979774734871387769341820153080114389963208802981950348838810531158008018344359508452080787513180143529940862146764455867023789873282229854369961858943198967601949065381702822063948782864180824772916158280109765763236669107748528134869136877384293967905148066340849008039895076967333959307357234602530545892650094427480954750642337016439652203694544227222723475146131494752368285601524873280878896895565879277312327682891324276305552448929400919471628123306383268086809388370759500678730713484914741452247729877941188003887790028603782458953449972108362613899032960545751787154529020529169605484116478122642240439325754346672696146872720217044815624877531561098546487469386041477799520447874553193129166926060913057341216382263568026385862673590829776479070420782704474472550063215627749056539617716269379710726425488809255725355708297950724512306427011892582756248932969129319795694973809771186408538545487280546675727305482283217754898811636094376139876028737927588631256298663572817134584951979236555994959435056815392248576588432876330735370848345139
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 100 of the certificate chain of a 2,373-digit prime (183 intermediate primes).

Certified number2,373-digit prime
Certificatedownload
Certificate chainshow step 100 of 183

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009061638411 --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":1100000009061638411},"decimal":true,"detail":2}}'