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 '213562148036768558123762520263212421833404723411596809314203475552059802178777696294111042638438324916716935791166290263666524022414813440315636843663227649580102993178927395455800636624538804877322639199538786917263215171319712596474366411400362985370610323868597611117076123786508800515585460577051552076710986240995492300010808444154120007688103418796354433567073742162710105886149903942516818019257455535108066818408878790843963465848862078152156875057665038007005800648736859664499013672664348289006947546877825538346751731875336444390387754307445000935361992907641895517825377316161460640899265610814447212985722610378593125797632966470460839887365947363044547722203518763289276611605371348471327519401616712426002599947187533588506732953592874576066479367276292191343130199583612438065793713229981432264140794743047987699526036771418108981095192380890850302229948659614271631332167953579203280863564518745354211090759722010544532061897236823909884856021721060449727701821661028878180829923214707515744406952041188111575003588538972789733785230887767161105202474641448833253443645374728229244160243096069329909027604879771979087570380248229633135177527701' --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":"213562148036768558123762520263212421833404723411596809314203475552059802178777696294111042638438324916716935791166290263666524022414813440315636843663227649580102993178927395455800636624538804877322639199538786917263215171319712596474366411400362985370610323868597611117076123786508800515585460577051552076710986240995492300010808444154120007688103418796354433567073742162710105886149903942516818019257455535108066818408878790843963465848862078152156875057665038007005800648736859664499013672664348289006947546877825538346751731875336444390387754307445000935361992907641895517825377316161460640899265610814447212985722610378593125797632966470460839887365947363044547722203518763289276611605371348471327519401616712426002599947187533588506732953592874576066479367276292191343130199583612438065793713229981432264140794743047987699526036771418108981095192380890850302229948659614271631332167953579203280863564518745354211090759722010544532061897236823909884856021721060449727701821661028878180829923214707515744406952041188111575003588538972789733785230887767161105202474641448833253443645374728229244160243096069329909027604879771979087570380248229633135177527701"},"decimal":false,"detail":2}}'