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 '31280082809251581646545804716667547674609790802466773537208677535739577226537357705868665054001921488913767891613107956189778356412333683723535322358412171113434548036268205195042643431978813877467102060580351052060294822987176806770803665717511228026586998404437795959602336103133619365329900501482336500997564785549135608659586368480347550876522271615401790996720305460443478790529800463685534402132490298332835484189472628166719455453408482237397334124710103689794233733880783828584842693758199067558253396789321483332464660504308050701853748122262830860755577630610449505391487115916890533848329976136955877414768765786783335682373482420721883286113194626125488430850149331807190704422381441917214134617157128065355990514476325490355282442595204703132334700108038650360189537612740902834090113899739412250774024715826239833817510292486625759131616223825746637445114686750136584349820394208798593354860805396906300447520722600614765934449926698134405419717357838253045947227853094677090310642886580595754009851744528295202738580125224715416322850212066581988660746264281727625620663235502989169074457136728976497176231141732345392799397310823233152354461816189877878093485764300386624257226610689797997853314490837068317236418047534905365629378858713208867826379270162570512607841858026058717128903659' --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":"31280082809251581646545804716667547674609790802466773537208677535739577226537357705868665054001921488913767891613107956189778356412333683723535322358412171113434548036268205195042643431978813877467102060580351052060294822987176806770803665717511228026586998404437795959602336103133619365329900501482336500997564785549135608659586368480347550876522271615401790996720305460443478790529800463685534402132490298332835484189472628166719455453408482237397334124710103689794233733880783828584842693758199067558253396789321483332464660504308050701853748122262830860755577630610449505391487115916890533848329976136955877414768765786783335682373482420721883286113194626125488430850149331807190704422381441917214134617157128065355990514476325490355282442595204703132334700108038650360189537612740902834090113899739412250774024715826239833817510292486625759131616223825746637445114686750136584349820394208798593354860805396906300447520722600614765934449926698134405419717357838253045947227853094677090310642886580595754009851744528295202738580125224715416322850212066581988660746264281727625620663235502989169074457136728976497176231141732345392799397310823233152354461816189877878093485764300386624257226610689797997853314490837068317236418047534905365629378858713208867826379270162570512607841858026058717128903659"},"decimal":false,"detail":2}}'