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 aliquot sequence of
109459
Term #1 of the Home prime · Base 2 sequence of
1500
Term #2 of the Home prime · Base 4 sequence of
2229
Term #1 of the Home prime · Base 6 sequence of
3490
Term #1 of the Home prime · Base 8 sequence of
9505
Term #1 of the Home prime · Base 10 sequence of
4762
Term #3 of the Inverse home prime · Base 2 sequence of
2071
Term #2 of the Inverse home prime · Base 8 sequence of
4067
Term #1 of the Home prime · Base 16 sequence of
3815
Term #1 of the Home prime · Base 22 sequence of
140
Term #1 of the Home prime · Base 36 sequence of
5933
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
15252
Term #1 of the Conway climb · Base 2 sequence of
3900
Term #2 of the Conway climb · Base 4 sequence of
2229
Term #1 of the Conway climb · Base 6 sequence of
3490
Term #1 of the Conway climb · Base 8 sequence of
9505
Term #1 of the Conway climb · Base 10 sequence of
4762
Term #1 of the Conway climb · Base 16 sequence of
3815
Term #1 of the Conway climb · Base 22 sequence of
140
Term #1 of the Conway climb · Base 36 sequence of
5933
Term #1 of the Distinct-prime home prime · Base 2 sequence of
8770
Term #1 of the Distinct-prime home prime · Base 8 sequence of
9505
Term #1 of the Distinct-prime home prime · Base 10 sequence of
4762
Term #1 of the Distinct-prime home prime · Base 16 sequence of
3815
Term #1 of the Distinct-prime home prime, descending · Base 2 sequence of
13985
Term #1 of the Distinct-prime home prime, descending · Base 8 sequence of
13985
Term #1 of the Second-class home prime · Base 2 sequence of
3000
Term #4 of the Second-class home prime · Base 3 sequence of
18774
Term #8 of the Second-class home prime · Base 8 sequence of
13360
Term #1 of the Second-class home prime · Base 10 sequence of
9524
Term #1 of the Second-class home prime · Base 16 sequence of
7630
Term #3 of the Mid-divisor concatenation · Base 2 sequence of
8481
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
9505
Term #2 of the Mid-divisor concatenation · Base 10 sequence of
2914
Term #2 of the Mid-divisor concatenation · Base 16 sequence of
2582
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '22381' --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":"22381"},"decimal":false,"detail":2}}'