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 '1268772687875036705422618238358737644922369113234063626044887246488595265307127022614418756525672356777185271628875839812721101905318834589275473556198796724637672306678532420890324478062884654242154250131036353669788438733676196119357469134170127389422389441767929362220137601878994509659851843870367149894089454640121261397540820711993878645793819288837620383140390957416986811749853452965156279485515129720059840523047578089222791175470629548476828432080539285464943979246596277750152411518720569391582552399466912709398721559036738667887500135137849730478970251117945214291062929294439029493340198439441677668093459139348642286851728266009719243430969458106203539553066005341009603419307103826779741624937914294521788487191414088852843714598182659937867006595098882766618839775273467747831687006221206245305876002724439014478910406114673276750716331985512323050341665977201172625429153836879199185021018820923767002618224021621807183243596664967294074067300833463953233590920139185706547113608764554708230476668175903699212382212996821664654835429574094354852584220407064805885514207009250493534916457660272459881823436542869771388375179933195827013062686739171792160436322186009971356480205072755319126529132732381892078728572371708785501191364050608651496983346928211872767983' --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":"1268772687875036705422618238358737644922369113234063626044887246488595265307127022614418756525672356777185271628875839812721101905318834589275473556198796724637672306678532420890324478062884654242154250131036353669788438733676196119357469134170127389422389441767929362220137601878994509659851843870367149894089454640121261397540820711993878645793819288837620383140390957416986811749853452965156279485515129720059840523047578089222791175470629548476828432080539285464943979246596277750152411518720569391582552399466912709398721559036738667887500135137849730478970251117945214291062929294439029493340198439441677668093459139348642286851728266009719243430969458106203539553066005341009603419307103826779741624937914294521788487191414088852843714598182659937867006595098882766618839775273467747831687006221206245305876002724439014478910406114673276750716331985512323050341665977201172625429153836879199185021018820923767002618224021621807183243596664967294074067300833463953233590920139185706547113608764554708230476668175903699212382212996821664654835429574094354852584220407064805885514207009250493534916457660272459881823436542869771388375179933195827013062686739171792160436322186009971356480205072755319126529132732381892078728572371708785501191364050608651496983346928211872767983"},"decimal":false,"detail":2}}'