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 '165631377599690353575703595999854848169118010608041108153267024280603038409088809406788109123288822255411504448364640382587046450821194606567666095100107881788909902681978148231967578863884664325017178984726569343213538372493204622808131568200671926093331411425893602247369080258181658628847596706312024958396518238621424156565634717815390882411229710642808863961947221244746203793586100792215658874159847510362813619625421343085141243712198255475256853265836211727076504277571108072855230406562173159056607408329026581055874670881809053699314590021797264626066185644047587885426701881446272972310046827793242243206913511907074481717916628912601430622976051745306071148459562932967648342528793554528600473093771629530609540348327061806663047035361515644761856042290426153594727280114537554776735423543990871346395699971508504422669919970922828894951629553414717562364870417562498891692278069409208793179176474906817377369465425862325275103959507640397957956742341251504272771501540654965902303124868091098117355261228947990032596072043231662687944078292787322101295225338260283207062359729511517997724907876538082866933794007337728029529010188270043710605194172292630112687142792636374819731596206209912343637107922427027431833961589342369499345068619653169248092741896790898263231173299674673532326254966924241258616605290534813' --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":"165631377599690353575703595999854848169118010608041108153267024280603038409088809406788109123288822255411504448364640382587046450821194606567666095100107881788909902681978148231967578863884664325017178984726569343213538372493204622808131568200671926093331411425893602247369080258181658628847596706312024958396518238621424156565634717815390882411229710642808863961947221244746203793586100792215658874159847510362813619625421343085141243712198255475256853265836211727076504277571108072855230406562173159056607408329026581055874670881809053699314590021797264626066185644047587885426701881446272972310046827793242243206913511907074481717916628912601430622976051745306071148459562932967648342528793554528600473093771629530609540348327061806663047035361515644761856042290426153594727280114537554776735423543990871346395699971508504422669919970922828894951629553414717562364870417562498891692278069409208793179176474906817377369465425862325275103959507640397957956742341251504272771501540654965902303124868091098117355261228947990032596072043231662687944078292787322101295225338260283207062359729511517997724907876538082866933794007337728029529010188270043710605194172292630112687142792636374819731596206209912343637107922427027431833961589342369499345068619653169248092741896790898263231173299674673532326254966924241258616605290534813"},"decimal":false,"detail":2}}'