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 '23974218426583852159189991985090393378698691633346341638443129180688141067081154869640939966964011819258854082212487934383333732963978849696663492555389269148497003226107475959220491378370742132553878263942530940096235125036138314184014517958821970630109286764406201934124833526419770843956727001528694834075949398519792668097131781837191636961871247243455166892908987978106683320870631569732504049134658805311902172978705943656356103688295247627867595444202289742806818141949207925649271073263623887846677718419040370010913915601175053289156292913936649456363056994458628333593766159065389692387725561931610833440971147695927434268491518181573498646615942094562889377469540868177812457958265992166990307023466468811059380274859306364900406142852885834747237470683876478733276880964283268184642519261625576650429341377115703286667683751851280012118782841349929799638856983042504474010318606345212474247221543465765418199573224618441869376715990673944326699999827171740459925174603560978114888834816117059663829185966828667025684761690090478106857424929138914474072582836459697' --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":"23974218426583852159189991985090393378698691633346341638443129180688141067081154869640939966964011819258854082212487934383333732963978849696663492555389269148497003226107475959220491378370742132553878263942530940096235125036138314184014517958821970630109286764406201934124833526419770843956727001528694834075949398519792668097131781837191636961871247243455166892908987978106683320870631569732504049134658805311902172978705943656356103688295247627867595444202289742806818141949207925649271073263623887846677718419040370010913915601175053289156292913936649456363056994458628333593766159065389692387725561931610833440971147695927434268491518181573498646615942094562889377469540868177812457958265992166990307023466468811059380274859306364900406142852885834747237470683876478733276880964283268184642519261625576650429341377115703286667683751851280012118782841349929799638856983042504474010318606345212474247221543465765418199573224618441869376715990673944326699999827171740459925174603560978114888834816117059663829185966828667025684761690090478106857424929138914474072582836459697"},"decimal":false,"detail":2}}'