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 '319971463211416525818840188554297161930370740115513831819933045793543160240819264285230113007681665256364866259370071993573439747534557581340748233966991012786732393580080025023030871058484731600589971577100082243439306203971797476411723801115866489140148331724731071004490482177788629647987049405617436162456952867057814196839255640521894644800336139364052113340400586457625931746986280113741596314873510848481742312696834761647886126542687378180011150871291006082071691949501010264553478375598237006753445163405338922830878680554066700393927556761981907007668763198022258969752659122443685401939050157393686527946856133955526922984544113615144264619248697362824398483084237553924029102691857851150949634593988917534513254055201331019534867387434248812401408405293463029954635068611729579019569137569884398944335407377880319172750263164904654664882608861718213763998293439655592699347468345766353368464621039889844640018647275288026394287650939761516878523077191125893912110943337152363976039641722752421600623810779193672819616505001901031121161086806552897667485639958335044379257163066368038501004552538328461418586393848570105882925139583361742313616192021609310087213174174723297192276270576478273452883824660189370698303191481433806728920380543941191179528337489' --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":"319971463211416525818840188554297161930370740115513831819933045793543160240819264285230113007681665256364866259370071993573439747534557581340748233966991012786732393580080025023030871058484731600589971577100082243439306203971797476411723801115866489140148331724731071004490482177788629647987049405617436162456952867057814196839255640521894644800336139364052113340400586457625931746986280113741596314873510848481742312696834761647886126542687378180011150871291006082071691949501010264553478375598237006753445163405338922830878680554066700393927556761981907007668763198022258969752659122443685401939050157393686527946856133955526922984544113615144264619248697362824398483084237553924029102691857851150949634593988917534513254055201331019534867387434248812401408405293463029954635068611729579019569137569884398944335407377880319172750263164904654664882608861718213763998293439655592699347468345766353368464621039889844640018647275288026394287650939761516878523077191125893912110943337152363976039641722752421600623810779193672819616505001901031121161086806552897667485639958335044379257163066368038501004552538328461418586393848570105882925139583361742313616192021609310087213174174723297192276270576478273452883824660189370698303191481433806728920380543941191179528337489"},"decimal":false,"detail":2}}'