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.
Numbers below 300 digits are proved directly by the background prover - this one will be marked proven prime automatically, usually within moments. Reload to check.
From the command linefdb · curl
fdb
fdb number '25851477504372007232864951694475207665354523899584429444605762531553295317296643898849862481434369735421625430861868721449355607247525551381719232818670280106637373794365908488957371092250596861431355107303355326448343981173529947' --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":"25851477504372007232864951694475207665354523899584429444605762531553295317296643898849862481434369735421625430861868721449355607247525551381719232818670280106637373794365908488957371092250596861431355107303355326448343981173529947"},"decimal":false,"detail":2}}'