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 '65306355780327765784079883054599274342401456404815488333130805498686574194577007126997813113644156220213362512703053006081690297398604546817797608705452749850074390414820290850504469658453478662400750599769878891702832882359337204662172782077865975556479434337721456370696579165388285222066191884363896096991851619434381596455992845953506399056566228178449480481010693291644479417391581822919843040438039182060089671293089249994072592014703266353351710106788133695398398058307094464492868432729744967830291716610040268161641773125302059483114502162878072126825185043333734521321613265468288482347602596240918894515210856040961697439941031647652648725919684588940733042568503846986731447789892599103129945213095748136600160555765730797059947129407440224931307763141572982905268478435749745295374132255376249381209652246961679572773775693648586024507560682277070010646578010938957820299605488792567181312494624571336905485019368074011139420073455862501507579503576785940026500772054797437491156509458316506634900288251364954711974928298273242520466803556246222025973070037278063399981468022660400079324953912046590202622948119899105983404371466110922888916883164621848562332376789039155542614469645911' --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":"65306355780327765784079883054599274342401456404815488333130805498686574194577007126997813113644156220213362512703053006081690297398604546817797608705452749850074390414820290850504469658453478662400750599769878891702832882359337204662172782077865975556479434337721456370696579165388285222066191884363896096991851619434381596455992845953506399056566228178449480481010693291644479417391581822919843040438039182060089671293089249994072592014703266353351710106788133695398398058307094464492868432729744967830291716610040268161641773125302059483114502162878072126825185043333734521321613265468288482347602596240918894515210856040961697439941031647652648725919684588940733042568503846986731447789892599103129945213095748136600160555765730797059947129407440224931307763141572982905268478435749745295374132255376249381209652246961679572773775693648586024507560682277070010646578010938957820299605488792567181312494624571336905485019368074011139420073455862501507579503576785940026500772054797437491156509458316506634900288251364954711974928298273242520466803556246222025973070037278063399981468022660400079324953912046590202622948119899105983404371466110922888916883164621848562332376789039155542614469645911"},"decimal":false,"detail":2}}'