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 '19677443646128381785112310024009639812368310999419244262887639051054635396971075690841776192109475189155381160408868018183159212293923522768319820814249282777984274143247961487271802238199486665293810038556890065510864406045734197405362719432057760234134722520799349864883167944575966343867265436365021442930262017289293879350699752199339642467950114273882065283456888154210152864638317599048036819543794842932164357124493005506408874813498063048499233378197163793468603399480180737351609708407953724527579469483541713363829771570876901860638385614454546350141164934824051764695509798445892656822268144960792325431321014774324814171006024546079790085554129723969506759600637078629807519392206911705851462793175433115864889822303275330391567094969951517098251587546874682455391329054598127937551079498474309104819072539385772728889913250306127049254253960404173095190898367926417003647659081415057587575408442646459920604365317917118578878607458589578907706139892408355305398762275900027968267005876928168391928392718093108071495635479268226475151593246782516350839989082530962095931448433350847331482318196910071353137833576526671170646904790991652018823383173159870781948204669542321735763830477110841933181836701019908842064494559659592004457803815419997470777396301610528151172877604483358799197306837786529588296744625844835840821360514573068848206816086582395042820291970153770916829498263226612469835763397384337384635107718896031057750015396850141907967285964922512462308238798093729916976299493232735926684978920521450072923640978397246651108329382554841530960386963' --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":"19677443646128381785112310024009639812368310999419244262887639051054635396971075690841776192109475189155381160408868018183159212293923522768319820814249282777984274143247961487271802238199486665293810038556890065510864406045734197405362719432057760234134722520799349864883167944575966343867265436365021442930262017289293879350699752199339642467950114273882065283456888154210152864638317599048036819543794842932164357124493005506408874813498063048499233378197163793468603399480180737351609708407953724527579469483541713363829771570876901860638385614454546350141164934824051764695509798445892656822268144960792325431321014774324814171006024546079790085554129723969506759600637078629807519392206911705851462793175433115864889822303275330391567094969951517098251587546874682455391329054598127937551079498474309104819072539385772728889913250306127049254253960404173095190898367926417003647659081415057587575408442646459920604365317917118578878607458589578907706139892408355305398762275900027968267005876928168391928392718093108071495635479268226475151593246782516350839989082530962095931448433350847331482318196910071353137833576526671170646904790991652018823383173159870781948204669542321735763830477110841933181836701019908842064494559659592004457803815419997470777396301610528151172877604483358799197306837786529588296744625844835840821360514573068848206816086582395042820291970153770916829498263226612469835763397384337384635107718896031057750015396850141907967285964922512462308238798093729916976299493232735926684978920521450072923640978397246651108329382554841530960386963"},"decimal":false,"detail":2}}'