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 '155599135247640648215882447049815702774836306507092238428193366022933489741510261499586387349627877531070955796521568457211878965214837920539285051607503178287068875373221644247293604187087297886483622819005974350340742570232178477477676019992091456539803387424494890059176236569624187072981820815749389428924552248606113621880918916227823351915623524887382863623962197427770159602823525489938852718045220980462962411089965420719573190193246181371792275570983788303250729445047978338171628105402257276493073831851966141961997458233814601006263322410082868674773570127618424951086171862617046124647647056295806209612502597297191540549603137851547956476783395559773102140726275060490463982153736167690735934897282293978335262653400198790529919712847295856833294379370629237979162445098706372998215026279891560525655154930718650875154101783522741967619624376090075850261370122474253723997324208937607669189347230292747655042405869432645913062973723138708019573764102258598217102676426515694345351304340162562750353135294690886424987314056242561265406175220457963418873334413205329701437219979154538552807727595857395994595070857703119694775786657141262657679502024409598105299194202441053' --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":"155599135247640648215882447049815702774836306507092238428193366022933489741510261499586387349627877531070955796521568457211878965214837920539285051607503178287068875373221644247293604187087297886483622819005974350340742570232178477477676019992091456539803387424494890059176236569624187072981820815749389428924552248606113621880918916227823351915623524887382863623962197427770159602823525489938852718045220980462962411089965420719573190193246181371792275570983788303250729445047978338171628105402257276493073831851966141961997458233814601006263322410082868674773570127618424951086171862617046124647647056295806209612502597297191540549603137851547956476783395559773102140726275060490463982153736167690735934897282293978335262653400198790529919712847295856833294379370629237979162445098706372998215026279891560525655154930718650875154101783522741967619624376090075850261370122474253723997324208937607669189347230292747655042405869432645913062973723138708019573764102258598217102676426515694345351304340162562750353135294690886424987314056242561265406175220457963418873334413205329701437219979154538552807727595857395994595070857703119694775786657141262657679502024409598105299194202441053"},"decimal":false,"detail":2}}'