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 '1818225772294325511487427587785713634308458592455206435223223310500609568692387585207836402730535285858858846234632444563388802130093669648628583495127980696605627160808905331661926950990544445910688481208060732511782293638734897123961990739861562900909693253325086870070070939696747253583066537803807377743522482373231778453839785200732981181740643758712020039998572980835540429063786561723323081946376014928049587467769739880040359430262805463144361474440560185035432244227622045536778833469819067361850803057428606883794403944691232807896203772607124371529116856386509543191798361518783453688415360965304646696880181389420682251947128749059432615285832480609219552714351678445755403322341810652528287442477206387858174653980632776857447123733577645078733210306361026110863586168172509998868767526609314322973059248653434577400407' --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":"1818225772294325511487427587785713634308458592455206435223223310500609568692387585207836402730535285858858846234632444563388802130093669648628583495127980696605627160808905331661926950990544445910688481208060732511782293638734897123961990739861562900909693253325086870070070939696747253583066537803807377743522482373231778453839785200732981181740643758712020039998572980835540429063786561723323081946376014928049587467769739880040359430262805463144361474440560185035432244227622045536778833469819067361850803057428606883794403944691232807896203772607124371529116856386509543191798361518783453688415360965304646696880181389420682251947128749059432615285832480609219552714351678445755403322341810652528287442477206387858174653980632776857447123733577645078733210306361026110863586168172509998868767526609314322973059248653434577400407"},"decimal":false,"detail":2}}'