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 '815075304847648673292157887387212400277351847977623080102885550830040397297159199379322130215863234784140692832129135605072636773265066195718965447076737848356269541456423715296980796806776122051468164006651869622976726561543900910822165259875097356603998423925576785885733768912949131147434185370736682090400858883075890909083731281273225802318431400150038154186961060622300835675514539015923075669834808905031105716393480598243716853532789408728451047113376851944784646050715341666018159066337422978865709252402766531740111240593755570548589272122438630436063956568471857849753917179599435503897594895404178839709019269727422127648806940867510328547639370848412792339853794910280688569100592772789759475858055473215155828267907803497290111509841030920237592925200822002068520703590722416357418453308518891143362592382646928550555103056551449805729371208785069716249877150324691119844981265130350715426542761285107973059424815017653910126091352717115778450605176502853087485564784278347472430971217389069007339100839582795099853101912620087481067' --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":"815075304847648673292157887387212400277351847977623080102885550830040397297159199379322130215863234784140692832129135605072636773265066195718965447076737848356269541456423715296980796806776122051468164006651869622976726561543900910822165259875097356603998423925576785885733768912949131147434185370736682090400858883075890909083731281273225802318431400150038154186961060622300835675514539015923075669834808905031105716393480598243716853532789408728451047113376851944784646050715341666018159066337422978865709252402766531740111240593755570548589272122438630436063956568471857849753917179599435503897594895404178839709019269727422127648806940867510328547639370848412792339853794910280688569100592772789759475858055473215155828267907803497290111509841030920237592925200822002068520703590722416357418453308518891143362592382646928550555103056551449805729371208785069716249877150324691119844981265130350715426542761285107973059424815017653910126091352717115778450605176502853087485564784278347472430971217389069007339100839582795099853101912620087481067"},"decimal":false,"detail":2}}'