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 '1272862443044873896045991248963956766190428186828120741952195861762738801807386775239130087357106958056408902821949458355695280309816005172036891896430564850108727815463596093981800854372866782488823007869772181484771706001187816610924199406978571400454852507799201200733670805594269474275327847457830403767946436304322361775039566721859840211666532253227378201379974277307110993332213547212566330118236084770173229854397202406504953476655319373004227073359188085698729521298808301112281026608210628928157165795597299352644031215308311466490505651818122949181597531097474417893870223764646192412514466089524532836352163691019041601552988735577175327231395070337413583006304870862385767900362922665585572921470264301030483769315679589156641002968072849689024432231824956599476955227487492658536947213615244558181191388602124989791104686689533042503684500581172886082988131671880581507897847979063798074728911257914696135439442882781916363210776279984945847149497178335984913513244250280709564876392474275233524826605193829159162910581901600739702679470736309548987747798570231483905769724670005018730625858674642504658205891136349931557176416275763275166125561733321683351831775343766825497' --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":"1272862443044873896045991248963956766190428186828120741952195861762738801807386775239130087357106958056408902821949458355695280309816005172036891896430564850108727815463596093981800854372866782488823007869772181484771706001187816610924199406978571400454852507799201200733670805594269474275327847457830403767946436304322361775039566721859840211666532253227378201379974277307110993332213547212566330118236084770173229854397202406504953476655319373004227073359188085698729521298808301112281026608210628928157165795597299352644031215308311466490505651818122949181597531097474417893870223764646192412514466089524532836352163691019041601552988735577175327231395070337413583006304870862385767900362922665585572921470264301030483769315679589156641002968072849689024432231824956599476955227487492658536947213615244558181191388602124989791104686689533042503684500581172886082988131671880581507897847979063798074728911257914696135439442882781916363210776279984945847149497178335984913513244250280709564876392474275233524826605193829159162910581901600739702679470736309548987747798570231483905769724670005018730625858674642504658205891136349931557176416275763275166125561733321683351831775343766825497"},"decimal":false,"detail":2}}'