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 '218890701569884055532577584891076773425677261587380611136177448131020271358176164938492812810272679299323320866039342722175535732675208308814113962720805362005401220302699795659518815025868558701698833785716939937065448303480455187924820895375669656286602948535993792458732129965315945827757739119721226148822828880091428084744666829028723279090149945017782023898181884661351567854425021427694159228264608684559949006702658934767471184400337611162742924881383122202412488426574123283392540897536395116979616433821907887035183642285799845807174971977808115872902466000473736847764434686878038016900836303638932982832108141909935724223736369234551943144226215291544432983388873568686983112151256512554477808118928710962615821235598784194914445100087568137387673503639449636162466997949022569359' --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":"218890701569884055532577584891076773425677261587380611136177448131020271358176164938492812810272679299323320866039342722175535732675208308814113962720805362005401220302699795659518815025868558701698833785716939937065448303480455187924820895375669656286602948535993792458732129965315945827757739119721226148822828880091428084744666829028723279090149945017782023898181884661351567854425021427694159228264608684559949006702658934767471184400337611162742924881383122202412488426574123283392540897536395116979616433821907887035183642285799845807174971977808115872902466000473736847764434686878038016900836303638932982832108141909935724223736369234551943144226215291544432983388873568686983112151256512554477808118928710962615821235598784194914445100087568137387673503639449636162466997949022569359"},"decimal":false,"detail":2}}'