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 '201767958236948794597113876287671174917119623348774373653007522169727783666797134699011564323107126447473032805307317259527053359445775291808380931012939264617651471808006853463453239988853231783405713920027387006005337675119575064762260248203532484806695725259659829790428400007409129625741163631151177249658278060184130246983127744075495800490966405907500847529541937878382286323437143951786897568961116423371630489913711267232372966708348757866651097254894672273519151661687761400149580653150015164730745404113236392063059148753877238036801252173626385895988191207534470698205819590492455772966775143872924225071770676824446992036214229534797582381644591162466089354632789089703188869507646527661973351418384020010840100573417914337575526697602073962235213988782508007758796654843328014976912636571619330981889692732653392402789762195575052041516993206452003378509868680681788447462722669382468854600722904873593545321917470873271533127671176418968657112704122607309219212931755632920056226129431362824186261' --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":"201767958236948794597113876287671174917119623348774373653007522169727783666797134699011564323107126447473032805307317259527053359445775291808380931012939264617651471808006853463453239988853231783405713920027387006005337675119575064762260248203532484806695725259659829790428400007409129625741163631151177249658278060184130246983127744075495800490966405907500847529541937878382286323437143951786897568961116423371630489913711267232372966708348757866651097254894672273519151661687761400149580653150015164730745404113236392063059148753877238036801252173626385895988191207534470698205819590492455772966775143872924225071770676824446992036214229534797582381644591162466089354632789089703188869507646527661973351418384020010840100573417914337575526697602073962235213988782508007758796654843328014976912636571619330981889692732653392402789762195575052041516993206452003378509868680681788447462722669382468854600722904873593545321917470873271533127671176418968657112704122607309219212931755632920056226129431362824186261"},"decimal":false,"detail":2}}'