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 '389745874804837513660363166183726685949267357541336305996653799403659099891714530039469727656762420550958771960466272854699569888737017403478553330684715155529495556200231114601187008973390084294828399773519350064352943915994350189248280730474718567893251839960570472478711380128595005836924555166388303530787687179013394688438357146945244478263325728226442579963423917004008527921036868903887725602590477338192520492086426229446101577615488028046819093133840681194810685953008975876048791384935941167619027851888790373265932734278274255604278124469308966101' --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":"389745874804837513660363166183726685949267357541336305996653799403659099891714530039469727656762420550958771960466272854699569888737017403478553330684715155529495556200231114601187008973390084294828399773519350064352943915994350189248280730474718567893251839960570472478711380128595005836924555166388303530787687179013394688438357146945244478263325728226442579963423917004008527921036868903887725602590477338192520492086426229446101577615488028046819093133840681194810685953008975876048791384935941167619027851888790373265932734278274255604278124469308966101"},"decimal":false,"detail":2}}'