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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 #1100000009043271787 1,316 digits created 2026-08-03

Value

19161858290339218439425643581698614286313502626929531285623144704652813273756883832301893250531855421391951990456067058606368240025836923508860369347176045486038370585958714391158444605847418196945164606431492447512167334679922393435085518535900535185320521712649274965537714709158148094310870578405787522895722717761833537127975993799983969926825498952694000282165068510100455504585484189617556692779169791010471356635154587030686251616927019539498725176677960171276455627431578844841130337981347165378870494282600829598873819409462585699302319271073155905522090951132624909262835631808215978283329487997489905938153051125699071464250269803323154266270895511769648021924407294219630053757292886092038091800481992748141166208872219339743802730471131850006782321010429656082146351897069874605381165226554937173334776217338628449824980460821057498593992885873014227963644817096746329978289250679488408127218177226251002055748742142890174693861799016019446418260948780640456583225582607195975412230743609554182038570420138072637301019771647542796497169612103932603192119248311478642412748452367739524269743829972929889213421319100122690137157213523666649477858691818105246819143254323376581918681054969384168388121902198380747618634023328950464593472638423857108232286252727594157148199019370710430440067172567709260111
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 5 of the certificate chain of a 1,354-digit prime (118 intermediate primes).

Certified number1,354-digit prime
Certificatedownload
Certificate chainshow step 5 of 118

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009043271787 --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":1100000009043271787},"decimal":true,"detail":2}}'