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 '39862128774563276410101783477290225431896093036511681794891645324806417288043141335742869940772509807079782542331037964400663909108197190994160051851693402322409029426300802214766465792602314168537280927055688528436636301022639160557886748924776599885758838409445974594671416705885901761296323474586395800612889135389048455234336211129918655360494797228500700244007669841302631049467994941242418839478038821298452825860947236980626853718379969088482676633405143145240387818199034258884825430343166153548933460171954486108681547401412034748850364821930770311174006512524813965594530989634920954388158457993541735408927225855644292573541587901033661786280134082040619316301446167683615625171155202550999164270059711954845683666004477863687743762666527392755450238613403669570471254289207917388185637948686313255080790732843289791955623868664431098572574518990627900655685786796571437178113953889056209317817008222736463998746771550947560067713944067201802963918923810230553022001644859566907438925685575975390843806556940250142204801354020799248181120280576787022429518726455509331936238004282571941102392231673990277899183104364784712534818150551523630545187493969944195632980046328186743' --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":"39862128774563276410101783477290225431896093036511681794891645324806417288043141335742869940772509807079782542331037964400663909108197190994160051851693402322409029426300802214766465792602314168537280927055688528436636301022639160557886748924776599885758838409445974594671416705885901761296323474586395800612889135389048455234336211129918655360494797228500700244007669841302631049467994941242418839478038821298452825860947236980626853718379969088482676633405143145240387818199034258884825430343166153548933460171954486108681547401412034748850364821930770311174006512524813965594530989634920954388158457993541735408927225855644292573541587901033661786280134082040619316301446167683615625171155202550999164270059711954845683666004477863687743762666527392755450238613403669570471254289207917388185637948686313255080790732843289791955623868664431098572574518990627900655685786796571437178113953889056209317817008222736463998746771550947560067713944067201802963918923810230553022001644859566907438925685575975390843806556940250142204801354020799248181120280576787022429518726455509331936238004282571941102392231673990277899183104364784712534818150551523630545187493969944195632980046328186743"},"decimal":false,"detail":2}}'