P · Proven 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
Primality certificateproven prime
Proven by a stored certificate (3,339 digits).
Certificatedownload
Certificate chainshow steps
Uploaded byLuminescence
N-1 and N+1
Checking N-1 / N+1 factorization…
From the command linefdb · curl
fdb
fdb number id:1100000004413937028 --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":{"id":1100000004413937028},"decimal":false,"detail":2}}'