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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 #1100000009037628905 1,040 digits created 2026-08-02

Value

19856575001392795888021745732614257382704555227260916702447557342876048985494075069156410525801924670566514384937549654874410049573582027531163230948204215265285615205203785948135384443325715486543064357316859014625678386276410720869328362197145904659057374123683161965908166745884345580632587758384247168294259638920754836433267851554802244078982159239085063778653921778837660612997281894311206634273510623882907044761398852816164084783095885929560630123148943780938191450204139021032170109176769139498197297978843122077485699710618632817818185193548165912999955961870414126993297414951349702653554974628788156031202749884491774183621577878615760424389046967159309283218107092512883564815776782433860817012066934378100598930471246207512292238358159096693727908694038576159514370580439666456188034912444461400199444604905971798209712270655792757984521128500299224092367245310191176653967560122852201723988910091821727992492053261062167376782712672865292527153464812869437984165623891019364888955883518871573241721323996713879349064266304629
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 22 of the certificate chain of a 1,247-digit prime (104 intermediate primes).

Certified number1,247-digit prime
Certificatedownload
Certificate chainshow step 22 of 104

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000009037628905 --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":1100000009037628905},"decimal":true,"detail":2}}'