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.
↪
Term #1 of the Home prime · Base 14 sequence of
4498
Term #1 of the Home prime · Base 15 sequence of
2918
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
3696
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
7630
Term #1 of the Inverse home prime · Base 22 sequence of
1119
Term #1 of the Inverse home prime · Base 28 sequence of
1465
Term #1 of the Inverse home prime · Base 29 sequence of
566
Term #1 of the Conway climb · Base 14 sequence of
4498
Term #1 of the Conway climb · Base 15 sequence of
2918
Term #2 of the Second-class home prime · Base 3 sequence of
7124
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '8209' --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":"8209"},"decimal":false,"detail":2}}'