factordbrpc · fdb
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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 #1100000008729257245 1,055 digits created 2026-04-06

Value

20687269366915496854635002485472584341940927345725883734475079965126758738743607698232365333541609601546781316849869358851046621923221292743556841982902404927048154714651561469685273235426147685015909209491516665850802186898592413164239314128145734482423160834489835024077264970115926434231476058197652468865706996767063656314067009858211915604570025730404853129067548847377367294176464919193063821658591753170336008365453619267885841378880368038706648285090328556613429851210759277956552167106901928806442424623017530149882023315750949966688089448785654622246602611147773445288482327379630275747280395445459585298028755879403338625484208210525809687506770254672306472750078900078290317240109668427163099239640195609310290828106013668368369807384195037075381034442116920962255522159735411672769139055836284003896785603445206509989633617749915800161723447250547729920511318853252998938596866979799370574954940879226387839443562274461026100966587415959864997999266244767376617403375908303157056610324404038039835326545056557288479627032325494828496762536979
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Is factor of

Primality

Certificate chain stepproven prime

Proven as step 129 of the certificate chain of a 2,785-digit prime (201 intermediate primes).

Certified number2,785-digit prime
Certificatedownload
Certificate chainshow step 129 of 201

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008729257245 --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":1100000008729257245},"decimal":true,"detail":2}}'