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 6 sequence of
476
Term #1 of the Inverse home prime · Base 2 sequence of
10295
Term #2 of the Home prime · Base 24 sequence of
16327
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
18402
Term #1 of the Inverse home prime · Base 24 sequence of
3565
Term #1 of the Inverse home prime · Base 30 sequence of
14099
Term #1 of the Inverse home prime · Base 34 sequence of
10279
Term #2 of the Conway climb · Base 6 sequence of
98
Term #1 of the Conway climb · Base 18 sequence of
2421
Term #2 of the Conway climb · Base 24 sequence of
16327
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
8704
Term #1 of the Distinct-prime home prime, descending · Base 2 sequence of
10295
Term #2 of the Second-class home prime · Base 10 sequence of
11950
Term #2 of the Second-class home prime · Base 16 sequence of
6486
Term #1 of the Mid-divisor concatenation · Base 2 sequence of
16232
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
8116
Term #1 of the Mid-divisor concatenation · Base 16 sequence of
8116
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '18413' --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":"18413"},"decimal":false,"detail":2}}'