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 '542772169728391500509990426341478392393717239974727413305147420401263194879558519559752824067797803974499653577145351814576156200395434340955918599546231778213969984122360641825844341881387651055583591645063897551387588295613124277080208192118885723399252552852080903228520572743012284440031501225335533772353280756789304555053245246705018783792524859951071050220369386162147195396615028947456395185341941173030218957095301192846985410194765089697677167257616368076977972513344198232630522074127601656806146331262232074027207576239072981948750410370236116130124154015248359932016321963046983' --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":"542772169728391500509990426341478392393717239974727413305147420401263194879558519559752824067797803974499653577145351814576156200395434340955918599546231778213969984122360641825844341881387651055583591645063897551387588295613124277080208192118885723399252552852080903228520572743012284440031501225335533772353280756789304555053245246705018783792524859951071050220369386162147195396615028947456395185341941173030218957095301192846985410194765089697677167257616368076977972513344198232630522074127601656806146331262232074027207576239072981948750410370236116130124154015248359932016321963046983"},"decimal":false,"detail":2}}'