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 '198521033286557086025015227596861495724698230831459960269116237029713869268773321070532788850041904438549918210173028061367157676126027970216547598789980437912101557427105425633687055168118778343912360124579550877707284456714283732797512940420650307652034014764772202785002175534492146409040233365156620668934886820745426913606740297702845152148212301297518515456743836610021214691723985884408794221856986164041432150929740757554986312049268522495116514140239368069704572712312979490568642172909138706845148346613378680575463334230115473488256000098460919124006231864620032452825760552648303912165388918579779052552803870606192943' --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":"198521033286557086025015227596861495724698230831459960269116237029713869268773321070532788850041904438549918210173028061367157676126027970216547598789980437912101557427105425633687055168118778343912360124579550877707284456714283732797512940420650307652034014764772202785002175534492146409040233365156620668934886820745426913606740297702845152148212301297518515456743836610021214691723985884408794221856986164041432150929740757554986312049268522495116514140239368069704572712312979490568642172909138706845148346613378680575463334230115473488256000098460919124006231864620032452825760552648303912165388918579779052552803870606192943"},"decimal":false,"detail":2}}'