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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 #1100000009084007875 890 digits created 2026-08-14

Value

16121676238323263047381118862317872557492991038281449952514347707651937314640309764651549859233983921824771430561336676400781762367340212319743209586190034349153828513620552858373877770701684293024856493874732101857393199599540439984497414276112366869702080287348143466437395119708652152575771339770007852781758710276239207623883109220271080242539770347331900985622034029607370486317374058555083131730021566012294943500585013378008338110258044904945875412089344575833586740883175805765758268377525281589329716519405685489971035094994586022911480235643367307726720528490297834578215304769177267809490070845480335178463733747787685595706410110883157329817217433292273618022947576911357816080442375540405257229020026692627732222614855737162762502385571492941126455624160730128941911578017206553788203424023708908828232205241160519973025010286123982991719058359241772669245039128586393868072593
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 81 of the certificate chain of a 1,940-digit prime (149 intermediate primes).

Certified number1,940-digit prime
Certificatedownload
Certificate chainshow step 81 of 149

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009084007875 --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":1100000009084007875},"decimal":true,"detail":2}}'