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 '83771637377599135843306488490461781785719215160059688176170121382534021834979215414394555315045219635460933344017877617811632889927137824312134646112557703202074375953433607275257346785325848458667284105190835745978604619276255557853092991191130120240866345555901187872811704337214519351107301175416635899446276338989900734043130769757812029643239344825039164957458090500496097961692882656150355067451158676583044398116999516685741205972654750283765739899634978407220358171780018581470201429696131921700831866953630906320810751747740696301836470829246330749905159521044442568936565447312825029718132331171843101516991065393860849323013404674408986188271976378263914822182856467226155202434430261103093351248611384532481287105750265024318783297367977227780377861557818576675303248444781046228312846932110630044828464172182668898359575248848685476179550044819258910539485762538924990548623641860587312079923766655639524233114726439906404066604729567159711663665733477464360389980225322597299418845331059301503146998600007665332373345509108267723635735134931842762507500014514839227163941601962438671438788417404651616928626101311613836543475009169326810429717666927586965044113953080821839163210633513479194998324517624372839660876699025509403422981329804519482219653322462740062774688731701084751759406232591439421985873369381425281110065164115924210125853951030011330148448597120093314920921043701064076392977' --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":"83771637377599135843306488490461781785719215160059688176170121382534021834979215414394555315045219635460933344017877617811632889927137824312134646112557703202074375953433607275257346785325848458667284105190835745978604619276255557853092991191130120240866345555901187872811704337214519351107301175416635899446276338989900734043130769757812029643239344825039164957458090500496097961692882656150355067451158676583044398116999516685741205972654750283765739899634978407220358171780018581470201429696131921700831866953630906320810751747740696301836470829246330749905159521044442568936565447312825029718132331171843101516991065393860849323013404674408986188271976378263914822182856467226155202434430261103093351248611384532481287105750265024318783297367977227780377861557818576675303248444781046228312846932110630044828464172182668898359575248848685476179550044819258910539485762538924990548623641860587312079923766655639524233114726439906404066604729567159711663665733477464360389980225322597299418845331059301503146998600007665332373345509108267723635735134931842762507500014514839227163941601962438671438788417404651616928626101311613836543475009169326810429717666927586965044113953080821839163210633513479194998324517624372839660876699025509403422981329804519482219653322462740062774688731701084751759406232591439421985873369381425281110065164115924210125853951030011330148448597120093314920921043701064076392977"},"decimal":false,"detail":2}}'