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 '500474998660537958274496355848925061410087564652869302485621363418651541415210055790394552181752045627943327208202358840336078347964803284616359619641822120384245275868243422678801368238764154402297993664556581543889416282632975751126280400555251456168279056862057858212347203273952008925902067650918567308884693666641051954077350248459502460537574450185100218730590252156879126427886264332316833213921713417603410819193538698142958407024204000394966372204565352211677304137867499234699673735223455891075732538616243271587949353217385468648918608625367401492500203735644952709540274811815891981637986318369042791701069330386281150807925726163478158462695118776158974763806206572547444784529402560229673925543031621160063791811675012167658572911112174424644351910764483781707372372727665074153962750283050704176326666741912505321222081753385009661623015831790472062269112294270277642413838374796555420538740999426237848744255830608657598033891470548328309596315966108637231965483578304365989022873666050110248239140449550528134065821140801833782370443289347390653439606807954471274549966745286362219843042132403322313692893893249751469560958806177590511699944163318103206601550020808241578960942094313383191731875522262149712981083718164078535384720320108932652937068459825994841911726111546054115036299955333735502907136696651479781473749780967143156716234188537535861830395344526782636498028507063877827693927798953716379265352789323536255267058977022843622079482093060318211491386537367693905217199862937523' --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":"500474998660537958274496355848925061410087564652869302485621363418651541415210055790394552181752045627943327208202358840336078347964803284616359619641822120384245275868243422678801368238764154402297993664556581543889416282632975751126280400555251456168279056862057858212347203273952008925902067650918567308884693666641051954077350248459502460537574450185100218730590252156879126427886264332316833213921713417603410819193538698142958407024204000394966372204565352211677304137867499234699673735223455891075732538616243271587949353217385468648918608625367401492500203735644952709540274811815891981637986318369042791701069330386281150807925726163478158462695118776158974763806206572547444784529402560229673925543031621160063791811675012167658572911112174424644351910764483781707372372727665074153962750283050704176326666741912505321222081753385009661623015831790472062269112294270277642413838374796555420538740999426237848744255830608657598033891470548328309596315966108637231965483578304365989022873666050110248239140449550528134065821140801833782370443289347390653439606807954471274549966745286362219843042132403322313692893893249751469560958806177590511699944163318103206601550020808241578960942094313383191731875522262149712981083718164078535384720320108932652937068459825994841911726111546054115036299955333735502907136696651479781473749780967143156716234188537535861830395344526782636498028507063877827693927798953716379265352789323536255267058977022843622079482093060318211491386537367693905217199862937523"},"decimal":false,"detail":2}}'