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 '1338405446848706527687267041244986582247035521521740521367707528340054791924367971364191884755076860960534864216202535950853479837755363914359767685606176736389906579280550087596905065705763581496238244529338307687620867835181001089050832884869754938715181628148795192083197667316264610203331295583897061735913045675633689749743247046184086081452608628827236802407827817188907473552377698560558511397540340070171820940370130500430323234440298808921352332076224293' --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":"1338405446848706527687267041244986582247035521521740521367707528340054791924367971364191884755076860960534864216202535950853479837755363914359767685606176736389906579280550087596905065705763581496238244529338307687620867835181001089050832884869754938715181628148795192083197667316264610203331295583897061735913045675633689749743247046184086081452608628827236802407827817188907473552377698560558511397540340070171820940370130500430323234440298808921352332076224293"},"decimal":false,"detail":2}}'