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 '28775424609349159440695764951460302142554700202590146520190983758188968264279124536455340642812776091607972145515565226937442466867652619118267965948443465028711988967231271432099114549302137538369267212191109731311493307438705159145608637100488652338418178044024290294253274798581931058938818966561270764844240507470796697144647941487346979415637557090216526163677000509155437513800970255825659186250606960954138893309376333874126322214640844374613631548576362289321961669985273503369765254236883447532201975640136458093070954101807642928828588931366759523586236640803264536496801855899849897251225939923266992812326965024016425628201671049656572009053995284552465650635787476601519019999496533' --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":"28775424609349159440695764951460302142554700202590146520190983758188968264279124536455340642812776091607972145515565226937442466867652619118267965948443465028711988967231271432099114549302137538369267212191109731311493307438705159145608637100488652338418178044024290294253274798581931058938818966561270764844240507470796697144647941487346979415637557090216526163677000509155437513800970255825659186250606960954138893309376333874126322214640844374613631548576362289321961669985273503369765254236883447532201975640136458093070954101807642928828588931366759523586236640803264536496801855899849897251225939923266992812326965024016425628201671049656572009053995284552465650635787476601519019999496533"},"decimal":false,"detail":2}}'