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 '1266956948674920606225149462142269480262304474886530988099566367980975814901174781378457995566468827178078240666506107468493925868307384445333165198723935266314114832591338561161936840582740008073099407565612575927704914586971111707657400010994595150657660381748999646790085573322585511083218050567824631946141465402629262725870415414487829882442395686539970234172403383756499404808962598289812268561396753281533462720991395849258756001172335611406430913650446341732208303135330675038829222539981370172582495825670363135631116969103999932225398676438691548159376370024495722535273225970367934428048749932770781698995392435584463171877901326053457225086794096312775674709346821020006175655905323959651333729304829147600343242438320088086277387147983188163383714734423999438653991910003009142774666681199968526461005883191622542369890021548026882358267566179534303764577740504149505996572280482964055600450902625252679718704745212962823483117494557873505276598711736324950532886241040057402962731337283175539291443962545199166148794819300850674382624492250333210853375061005837796069009056787080692292770042058803570616157649170414412188833809815292680806735311848357290959380362421160669993540161641691' --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":"1266956948674920606225149462142269480262304474886530988099566367980975814901174781378457995566468827178078240666506107468493925868307384445333165198723935266314114832591338561161936840582740008073099407565612575927704914586971111707657400010994595150657660381748999646790085573322585511083218050567824631946141465402629262725870415414487829882442395686539970234172403383756499404808962598289812268561396753281533462720991395849258756001172335611406430913650446341732208303135330675038829222539981370172582495825670363135631116969103999932225398676438691548159376370024495722535273225970367934428048749932770781698995392435584463171877901326053457225086794096312775674709346821020006175655905323959651333729304829147600343242438320088086277387147983188163383714734423999438653991910003009142774666681199968526461005883191622542369890021548026882358267566179534303764577740504149505996572280482964055600450902625252679718704745212962823483117494557873505276598711736324950532886241040057402962731337283175539291443962545199166148794819300850674382624492250333210853375061005837796069009056787080692292770042058803570616157649170414412188833809815292680806735311848357290959380362421160669993540161641691"},"decimal":false,"detail":2}}'