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 '19834091473660949872745468725892411979598379951366914989258150810493973624543612302780827265285645595625014367660542216681180047449077003645277272993012680610580542133123056219900732934958233007273102483798954016838250050074979903640377178239549616477041014224262758106949881056214773751758142345266527652716774826975243669135461729895920759111661227562622461406140549802261046346963309512127996401508076992940845348640729231922872985816135446839914713998661576585434473089724639247909401893293686524887525791580892131344120698806146860279227701865815715692054448771977628441800076345643638460107343516624770674126988093044197590266663207273972904079812629092186770995171450808497146857080010884187128831048007672080436419522269144219507222997769722810670274206239991141055198135844312017987416796430330343486337134106268236685045771572311819' --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":"19834091473660949872745468725892411979598379951366914989258150810493973624543612302780827265285645595625014367660542216681180047449077003645277272993012680610580542133123056219900732934958233007273102483798954016838250050074979903640377178239549616477041014224262758106949881056214773751758142345266527652716774826975243669135461729895920759111661227562622461406140549802261046346963309512127996401508076992940845348640729231922872985816135446839914713998661576585434473089724639247909401893293686524887525791580892131344120698806146860279227701865815715692054448771977628441800076345643638460107343516624770674126988093044197590266663207273972904079812629092186770995171450808497146857080010884187128831048007672080436419522269144219507222997769722810670274206239991141055198135844312017987416796430330343486337134106268236685045771572311819"},"decimal":false,"detail":2}}'