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 '28107593471910307334895189519711700089226260951499439389839843970188878946283480899988930349360527781608383714582374233260653219521705785590700905686149729641430322603451119074797490725445290143959760752029869525183883984139986022751985433851825070881296566933040958599563148841111566851556714724829730664691032449013448213818128259970755097830200057883125939680016719495375932505000597452596676380022408216734032803505106714477392473438718691172854231262705667627704592183239197861301977234965773469354658734847668714079864656937822389952428253283818017066231749845535162837676682077151564772679328861041700317374398459817700888126587126572567735673942248764874722458150636209939273846946753842979537689098874346497093085475065935747317201629591378775135234188168555273264112948476365622447369191293340804997775907481360582019664756885096705893690956106486629843' --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":"28107593471910307334895189519711700089226260951499439389839843970188878946283480899988930349360527781608383714582374233260653219521705785590700905686149729641430322603451119074797490725445290143959760752029869525183883984139986022751985433851825070881296566933040958599563148841111566851556714724829730664691032449013448213818128259970755097830200057883125939680016719495375932505000597452596676380022408216734032803505106714477392473438718691172854231262705667627704592183239197861301977234965773469354658734847668714079864656937822389952428253283818017066231749845535162837676682077151564772679328861041700317374398459817700888126587126572567735673942248764874722458150636209939273846946753842979537689098874346497093085475065935747317201629591378775135234188168555273264112948476365622447369191293340804997775907481360582019664756885096705893690956106486629843"},"decimal":false,"detail":2}}'