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 '20068053562453789525840677636532112155118101721459041938713464150557752529068307483868709167219457921243383409706413948107863520382660822494203581539615472080316054235105389702800686234108965312664663455052822566998340761266802866097324918747830121231905126866022161256595477453854870085813051857973695498989665610183127657928767893993162809645886528266178176303199050218040869746283589401788202842489353847567081741807623831495785422705302605419653771108133836216096642406589767037255403068162042528097399500632416199033536668952118141740308775015540563652181146097718073608169648759817' --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":"20068053562453789525840677636532112155118101721459041938713464150557752529068307483868709167219457921243383409706413948107863520382660822494203581539615472080316054235105389702800686234108965312664663455052822566998340761266802866097324918747830121231905126866022161256595477453854870085813051857973695498989665610183127657928767893993162809645886528266178176303199050218040869746283589401788202842489353847567081741807623831495785422705302605419653771108133836216096642406589767037255403068162042528097399500632416199033536668952118141740308775015540563652181146097718073608169648759817"},"decimal":false,"detail":2}}'