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 '2663153565022472073568247573879907521875489262361223510143905379659859405727523917640944223696550576507081466671608169851705857606541258399802926918223866352062779306186074671959550025795409389206871659347900831804257129983532524851195210631528422835095876376765864572270377472814526326989353673279866552174420701062612284340693340135947670468544771796895096952925578678944002700983737388365513362504026777423028503083700093282180029749400272348049332872509968760029732763698703181584237919969011867065569809873371994951451373443586059416683795725175470323782624786744046539252206419221759246530736454933779817784453124393626596976760388490621589068944061546260285247097958303612440320249563483096444688060435579362609933557941430713268260361098231403694077929366535008724377957678841309090431202491008284326934136194908491962692341830734077330489362146910408151624676952985079936786000961201810960280876097873601390341192678411086295676930204730200130438135282980785576155255680259799208728233389061519602851334537233561908802808372213495336831122806916565277678860751135666062461759121370110643482554012631229422166279332083719634856961123537080704806379325180030876642358338072669698395601969529007490048039180181648421366591881110112409279785210258294934889890538510463333256626779275099250779002005815316353890227560385253561859998490658879903' --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":"2663153565022472073568247573879907521875489262361223510143905379659859405727523917640944223696550576507081466671608169851705857606541258399802926918223866352062779306186074671959550025795409389206871659347900831804257129983532524851195210631528422835095876376765864572270377472814526326989353673279866552174420701062612284340693340135947670468544771796895096952925578678944002700983737388365513362504026777423028503083700093282180029749400272348049332872509968760029732763698703181584237919969011867065569809873371994951451373443586059416683795725175470323782624786744046539252206419221759246530736454933779817784453124393626596976760388490621589068944061546260285247097958303612440320249563483096444688060435579362609933557941430713268260361098231403694077929366535008724377957678841309090431202491008284326934136194908491962692341830734077330489362146910408151624676952985079936786000961201810960280876097873601390341192678411086295676930204730200130438135282980785576155255680259799208728233389061519602851334537233561908802808372213495336831122806916565277678860751135666062461759121370110643482554012631229422166279332083719634856961123537080704806379325180030876642358338072669698395601969529007490048039180181648421366591881110112409279785210258294934889890538510463333256626779275099250779002005815316353890227560385253561859998490658879903"},"decimal":false,"detail":2}}'