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 '50963784171004086961687694625764847362471102708416587154302484746595773142861341498252992974854574680350868134691172474191618440812618824677788476631480215642145237502639068095417440937804861681080875757135334388365258008264530339170074290668023216184197645713821940605763711115971490090795537400814121532885072152268337115774913893251405212377170073811672925055594486468288245843679690784311009037883230665590190861921154118615937600835493841638985738320685376572662629542727634463274388666856637328875241895524185766963864030126454928124417507207591985164078894829343808416635338744527668417227768578487076610320716864767948294597139620045942186390598314623266055112663480261686583395266592233345598637462792673086423175850984634860144011244237900348954811069084711069245963520539373059678756176638277222078600141586753578305231361350627770076357481086851436472333675352165765760452896510001563117924199287510857651018699088741686576603658914470729676149113816295392919335743642620017434426908095984636029700083983540959459722692798766737170543921836588423196778125134693057291489589499114879701246570904637024436234442551013313064853991025958714153187877942793926442198802212354310831739198197500522778238908613534546158762188635859071629996527485063419254269001987814242905302618261045834697667522766225290179386152573454358091' --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":"50963784171004086961687694625764847362471102708416587154302484746595773142861341498252992974854574680350868134691172474191618440812618824677788476631480215642145237502639068095417440937804861681080875757135334388365258008264530339170074290668023216184197645713821940605763711115971490090795537400814121532885072152268337115774913893251405212377170073811672925055594486468288245843679690784311009037883230665590190861921154118615937600835493841638985738320685376572662629542727634463274388666856637328875241895524185766963864030126454928124417507207591985164078894829343808416635338744527668417227768578487076610320716864767948294597139620045942186390598314623266055112663480261686583395266592233345598637462792673086423175850984634860144011244237900348954811069084711069245963520539373059678756176638277222078600141586753578305231361350627770076357481086851436472333675352165765760452896510001563117924199287510857651018699088741686576603658914470729676149113816295392919335743642620017434426908095984636029700083983540959459722692798766737170543921836588423196778125134693057291489589499114879701246570904637024436234442551013313064853991025958714153187877942793926442198802212354310831739198197500522778238908613534546158762188635859071629996527485063419254269001987814242905302618261045834697667522766225290179386152573454358091"},"decimal":false,"detail":2}}'