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 '205923584063216750063146913915166441662569255501984543189418781234786760693636505311182367053054396021283750567470109357369553660669492973838926867949240041224637540142762042231371366614271121810947680392206361062800178714119300315845336526389891603519070666990927514024174324831969567269638401544077739543138221914204368868556587972746177942247476421296093534193588464773825327472467327679770216369931101379286808182629738475180754911514935955589818594740677147357674329879567044028331350232294373082757219198714225478583579192032899434790511203163000891533837706599074117684926521863109874859908703197767970242678946602591063906937309862398347021108786257099247006410250643581753651994171322578681367924725091871955059888553690845117098927430608871350992807669372662769612133176572015775111595123490780474396977664209246154049283' --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":"205923584063216750063146913915166441662569255501984543189418781234786760693636505311182367053054396021283750567470109357369553660669492973838926867949240041224637540142762042231371366614271121810947680392206361062800178714119300315845336526389891603519070666990927514024174324831969567269638401544077739543138221914204368868556587972746177942247476421296093534193588464773825327472467327679770216369931101379286808182629738475180754911514935955589818594740677147357674329879567044028331350232294373082757219198714225478583579192032899434790511203163000891533837706599074117684926521863109874859908703197767970242678946602591063906937309862398347021108786257099247006410250643581753651994171322578681367924725091871955059888553690845117098927430608871350992807669372662769612133176572015775111595123490780474396977664209246154049283"},"decimal":false,"detail":2}}'