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 '225706325891764738109223975612633488736767127256453453435721329771944423677540669878882864514507163831952489146650356251849053183503621616818627436294324979848266261179637599609555634824804892696189683705673741250539067453072750737184916237926845359021749682290208333058369096348357706024724789957996539867405980398883198352960111052584282591556306391123008330672397481781877143475856881266191059271676986375038321584063421304820262978312374963115611528792588741388209890198659290504515138780466889845993412516691928910137665651557' --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":"225706325891764738109223975612633488736767127256453453435721329771944423677540669878882864514507163831952489146650356251849053183503621616818627436294324979848266261179637599609555634824804892696189683705673741250539067453072750737184916237926845359021749682290208333058369096348357706024724789957996539867405980398883198352960111052584282591556306391123008330672397481781877143475856881266191059271676986375038321584063421304820262978312374963115611528792588741388209890198659290504515138780466889845993412516691928910137665651557"},"decimal":false,"detail":2}}'