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 '1516014878742911196728986010365033634745559105916834545957226380357230161032656713941568917944399055910621016392009197132874815935019350674661531359600671041994521041916821424339872140921761131901726129282608817216965439142179843146577257802642551987903914461480405687950757286493686905478150094881383846817825743460564355992365299354531092119711876636586355061984695336998924652740897687623695996348924936634964993823196601009047933070809953220840205204442231611334230451054324616404695087022601813149614047039886505944842024023145244287701517886509925207544344168641453817770896149274890329705529788260692886584586348047381029765508256678273395372772724927220098366690380515000765073522453376985172835303657235235966205877483404712347728054554560633244979827455904602366055670499881819426368448623423454925681954790018202801954768634223208341418440449601874852874737661172451750880637557722715289765407053527673037013034283229080744326654603284798444821518235048777663843608495597248290627599644180877004392309324458092936697419858338424581811973849323241837285924810966478090572767212235562549680521624178778098726431371408341113630764615867595755601121852802101617270303151407730605752633395869144822810315633376104838552764937286056131' --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":"1516014878742911196728986010365033634745559105916834545957226380357230161032656713941568917944399055910621016392009197132874815935019350674661531359600671041994521041916821424339872140921761131901726129282608817216965439142179843146577257802642551987903914461480405687950757286493686905478150094881383846817825743460564355992365299354531092119711876636586355061984695336998924652740897687623695996348924936634964993823196601009047933070809953220840205204442231611334230451054324616404695087022601813149614047039886505944842024023145244287701517886509925207544344168641453817770896149274890329705529788260692886584586348047381029765508256678273395372772724927220098366690380515000765073522453376985172835303657235235966205877483404712347728054554560633244979827455904602366055670499881819426368448623423454925681954790018202801954768634223208341418440449601874852874737661172451750880637557722715289765407053527673037013034283229080744326654603284798444821518235048777663843608495597248290627599644180877004392309324458092936697419858338424581811973849323241837285924810966478090572767212235562549680521624178778098726431371408341113630764615867595755601121852802101617270303151407730605752633395869144822810315633376104838552764937286056131"},"decimal":false,"detail":2}}'