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 '15271138613876128003996462562216176890861592497999798035398279466097137215300230591073222676264084238743661513424897072610964662076366860945602427525391244000501714852055383747590720980474990773511844667838492912039613082347240321606589493336182358188118408923517777775842383037267110092821099330552653942274271331365712811948018696941584169967667044359448527919117253549639930687797761432231591529302584380208462414013690078972339193801948833484339053212469116569419973050023716524821208883681836537201857245570573745160430720706506173874679976269975635718138844710420333540849633519729831245630457139907167888836342890293423342189835276723552389625967543858277894352694661010334560442851043805455701554472610566144338949011964832993866293731477905873106135287451398383179765446141121920693156417871110769443013853601621880766749441970557432135416413871262788826893588732897727072759263698506204649953912805399673493161672136023907090540018137295386569064132547878940089216764948644934629291767516989219478091396504943995638945653763677003184856523352839461463459818824266409486660785680603895857082752437' --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":"15271138613876128003996462562216176890861592497999798035398279466097137215300230591073222676264084238743661513424897072610964662076366860945602427525391244000501714852055383747590720980474990773511844667838492912039613082347240321606589493336182358188118408923517777775842383037267110092821099330552653942274271331365712811948018696941584169967667044359448527919117253549639930687797761432231591529302584380208462414013690078972339193801948833484339053212469116569419973050023716524821208883681836537201857245570573745160430720706506173874679976269975635718138844710420333540849633519729831245630457139907167888836342890293423342189835276723552389625967543858277894352694661010334560442851043805455701554472610566144338949011964832993866293731477905873106135287451398383179765446141121920693156417871110769443013853601621880766749441970557432135416413871262788826893588732897727072759263698506204649953912805399673493161672136023907090540018137295386569064132547878940089216764948644934629291767516989219478091396504943995638945653763677003184856523352839461463459818824266409486660785680603895857082752437"},"decimal":false,"detail":2}}'