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 '2021940758925108701473498988951227435403220685180911636266102450023071998841017784886230563513435662820947996303440737860738597706476127329162165038940381062275464692983456045851499346420061197798960085527510935636578933954782051927403816362054328057031687667885344240146835499611562110994417796515753739907098993948669944379326486247616704851685978330439210256434058189900185250885682275484176686590598175515000325059547300451447342801145835843285940656736989041630484303285999044464196403600581548914016054437447631492806161932346009801745251322758771609761635931797108223393240362832876398931776427698827774940448285359145517915448813352579439746587707325228302681989633291415158085672298066787308508729270333387781682424844764987030752649816532584074113941560543199009080784977461' --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":"2021940758925108701473498988951227435403220685180911636266102450023071998841017784886230563513435662820947996303440737860738597706476127329162165038940381062275464692983456045851499346420061197798960085527510935636578933954782051927403816362054328057031687667885344240146835499611562110994417796515753739907098993948669944379326486247616704851685978330439210256434058189900185250885682275484176686590598175515000325059547300451447342801145835843285940656736989041630484303285999044464196403600581548914016054437447631492806161932346009801745251322758771609761635931797108223393240362832876398931776427698827774940448285359145517915448813352579439746587707325228302681989633291415158085672298066787308508729270333387781682424844764987030752649816532584074113941560543199009080784977461"},"decimal":false,"detail":2}}'