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 '12208378669460821322508495787122437855958299493946313072888268227707614571448383374059854170285858604269368997982325175247500460273518529231442104611031405732848501012226173630759408148757945276787992187538995076182695615046125560586520722114296003211824759441921973233568822543341152264402736190840066538869130674036407086913858780617897425218212951692966150483027447973322241445916927946247520085426819606254594478228413431625654901954704321090359276489829250593774946549892391147394633848848122255860783926385327194868060135148565790202080328896692619577100708118437419066393385903191619005487789611450905888547142270545001946212104800103652933655862241880962567522876818756636732837132545503408110237458588195549104317520135687734295111705731417652929978904931393405855718460467616495905628220784050279784312277399211867544773011595074453692121939409319969919248660811217242735267551641830245873096961307225186313132835998196358966198540475630559315642796527347253280447358099666923456126125542974126647290807807262557034347393324183816250250454756680154606512766012503277312438035827692437695812386178414059585596931609291576336628319468978206516415886356832868442275878566298735883797501510088722959356527940370268775192034291177366329868907117953524869043638829499858249730473643074831031074996972763737578068401365626212088499410263972386358357378885572988965947290403781012157898886544640987758486297413192713358756258732493653385881413745776177479984973050838129776408746784564219816805808830159068938002248846407190556935744603764288922996254107691055942101514850212452359248257007499849007799537313747911993391389310871601202883265204566428523' --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":"12208378669460821322508495787122437855958299493946313072888268227707614571448383374059854170285858604269368997982325175247500460273518529231442104611031405732848501012226173630759408148757945276787992187538995076182695615046125560586520722114296003211824759441921973233568822543341152264402736190840066538869130674036407086913858780617897425218212951692966150483027447973322241445916927946247520085426819606254594478228413431625654901954704321090359276489829250593774946549892391147394633848848122255860783926385327194868060135148565790202080328896692619577100708118437419066393385903191619005487789611450905888547142270545001946212104800103652933655862241880962567522876818756636732837132545503408110237458588195549104317520135687734295111705731417652929978904931393405855718460467616495905628220784050279784312277399211867544773011595074453692121939409319969919248660811217242735267551641830245873096961307225186313132835998196358966198540475630559315642796527347253280447358099666923456126125542974126647290807807262557034347393324183816250250454756680154606512766012503277312438035827692437695812386178414059585596931609291576336628319468978206516415886356832868442275878566298735883797501510088722959356527940370268775192034291177366329868907117953524869043638829499858249730473643074831031074996972763737578068401365626212088499410263972386358357378885572988965947290403781012157898886544640987758486297413192713358756258732493653385881413745776177479984973050838129776408746784564219816805808830159068938002248846407190556935744603764288922996254107691055942101514850212452359248257007499849007799537313747911993391389310871601202883265204566428523"},"decimal":false,"detail":2}}'