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 '139398780512016398120280148408862702241754757098697647996996779536632847983648583703224390447501632078483981530748889281204462898413223835682734883813792561185857956777304192655494381462152376167600218480685139182755835266707399828693183586925156621195791639808764368416842938869430605834059587748292569476671920788363873780993232506394104656244892467664017126669604441408565224797729630169055719075487325842483154948001000656162306047593525841430139355543712625941431796114362315901509180134433195089160182147815688957627979104354072816115962579997475321463031509111279144472416324500990136252274800460585709130653118706986007999666155395484365352833921877167282188070683948464391053304379331316208999486159890958802964231600138916085506303218001462566120290545705167226883583676014623393534905713151292381553' --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":"139398780512016398120280148408862702241754757098697647996996779536632847983648583703224390447501632078483981530748889281204462898413223835682734883813792561185857956777304192655494381462152376167600218480685139182755835266707399828693183586925156621195791639808764368416842938869430605834059587748292569476671920788363873780993232506394104656244892467664017126669604441408565224797729630169055719075487325842483154948001000656162306047593525841430139355543712625941431796114362315901509180134433195089160182147815688957627979104354072816115962579997475321463031509111279144472416324500990136252274800460585709130653118706986007999666155395484365352833921877167282188070683948464391053304379331316208999486159890958802964231600138916085506303218001462566120290545705167226883583676014623393534905713151292381553"},"decimal":false,"detail":2}}'