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 '178973663969647475415222924554510652428113093752526606707910526267938611420673080644101063187782197887558514326805802261499153222838279351329104470323973434343300419595953971040821580809001054557562525870205536305242048650555806176764578291889759318297474429264778641672979725221328808723389576098894559594901122704200415771708051631547913433191909158488267553165055577173998234465474005809180926645708822685988938553990346076159185508494391496002729555130983612836815049263738020572968208340701587158952227981755080557825410416070523370752346989176373114586413753537897735665689260091797538456940292334809485556360593494279885634349750121951669957264695537003271571376860534420621258700307259872545505399353581903426636901935108635184725817536076461458525073692771230310056756539372116540851365359265925724323840545714717286542058172848752588277595643750722592209798038072233838033694404027307081116687509947484057578869753127099' --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":"178973663969647475415222924554510652428113093752526606707910526267938611420673080644101063187782197887558514326805802261499153222838279351329104470323973434343300419595953971040821580809001054557562525870205536305242048650555806176764578291889759318297474429264778641672979725221328808723389576098894559594901122704200415771708051631547913433191909158488267553165055577173998234465474005809180926645708822685988938553990346076159185508494391496002729555130983612836815049263738020572968208340701587158952227981755080557825410416070523370752346989176373114586413753537897735665689260091797538456940292334809485556360593494279885634349750121951669957264695537003271571376860534420621258700307259872545505399353581903426636901935108635184725817536076461458525073692771230310056756539372116540851365359265925724323840545714717286542058172848752588277595643750722592209798038072233838033694404027307081116687509947484057578869753127099"},"decimal":false,"detail":2}}'