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 '847138352532663227098345994642525218355273867077877750377557870215789313010792821104663822360286355925819400585591893465577602295919350671234984139694441083551377080732042333538309795594282303686432831179942702881238050787070470334445116281731296062264440131066564089150367274012908673846674172084473399758842842593966181292556979575085829853942052439372761332668742166842403415875773413783783227079230511354711556195909440442296844789165022576080643765492283520389338943147992730955918286090467069338303521956181034635687557538154357878411728245739953784676642499902706009552852482041085173874172846350984787930567713615988719408698860635179961633346585607092943906883506440281578259024131057124125555252219096340001833587599165825893862120318402040826396707210053132402122429880885818026591517146654345047707215255275830956384047684075416698333614293232488845168425320147586849992788568481746939829528027456727553978882766479652466916920409651725993664369610225848071001232663368240941101245227404773191015576792940692202345822188705763805393840659920330414772003918988492769505410800926810679907372239927688758904050456673654539542694006697870334113886118344498010241047513906505936421245892077210113' --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":"847138352532663227098345994642525218355273867077877750377557870215789313010792821104663822360286355925819400585591893465577602295919350671234984139694441083551377080732042333538309795594282303686432831179942702881238050787070470334445116281731296062264440131066564089150367274012908673846674172084473399758842842593966181292556979575085829853942052439372761332668742166842403415875773413783783227079230511354711556195909440442296844789165022576080643765492283520389338943147992730955918286090467069338303521956181034635687557538154357878411728245739953784676642499902706009552852482041085173874172846350984787930567713615988719408698860635179961633346585607092943906883506440281578259024131057124125555252219096340001833587599165825893862120318402040826396707210053132402122429880885818026591517146654345047707215255275830956384047684075416698333614293232488845168425320147586849992788568481746939829528027456727553978882766479652466916920409651725993664369610225848071001232663368240941101245227404773191015576792940692202345822188705763805393840659920330414772003918988492769505410800926810679907372239927688758904050456673654539542694006697870334113886118344498010241047513906505936421245892077210113"},"decimal":false,"detail":2}}'