PRP · Probable prime
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.
Is factor of
Primality
This is a probable prime: it passes probabilistic tests but is not yet proven.
Build an ECPP certificate (for example with Primo) and upload it - it is stored and verified locally, then the number is promoted to proven prime.
Primo input filedownload .in
From the command linefdb · curl
fdb
fdb number '19261504816566238127489481521424542722236705801374136268373245741330337274213742514117160143551020867225111544995706394555029313626705943052126520623598025981024598298874277332478266364004022369517876683046245716349692909941256567774112805337860528756936634092681535656949494936548586783496344497165085057464629786141434549229762007128857174935665646476916776216901610184990266572919612273546243859023892990652404623750658415770947419018741011570016561233741698906730753863658727234062505883163963343210488163411' --detail 2
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get_number","params":{"target":{"expr":"19261504816566238127489481521424542722236705801374136268373245741330337274213742514117160143551020867225111544995706394555029313626705943052126520623598025981024598298874277332478266364004022369517876683046245716349692909941256567774112805337860528756936634092681535656949494936548586783496344497165085057464629786141434549229762007128857174935665646476916776216901610184990266572919612273546243859023892990652404623750658415770947419018741011570016561233741698906730753863658727234062505883163963343210488163411"},"decimal":false,"detail":2}}'