P · Proven prime
Enter a value, an expression, or a term with a variable like 10^n+1 to list a range.
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See the expression syntax & functions reference.
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Term #1 of the aliquot sequence of
340235
Term #2 of the Home prime · Base 2 sequence of
38165
Term #1 of the Home prime · Base 6 sequence of
68773
Term #2 of the Inverse home prime · Base 4 sequence of
10489
Term #2 of the Home prime · Base 12 sequence of
13343
Term #1 of the Home prime · Base 14 sequence of
33519
Term #1 of the Home prime · Base 15 sequence of
50342
Term #1 of the Home prime · Base 22 sequence of
20273
Term #1 of the Home prime · Base 26 sequence of
23723
Term #3 of the Home prime · Base 28 sequence of
16886
Term #1 of the Home prime · Base 29 sequence of
6775
Term #1 of the Home prime · Base 33 sequence of
4947
Term #1 of the Home prime · Base 36 sequence of
68773
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
67116
Term #1 of the Inverse home prime · Base 16 sequence of
39505
Term #1 of the Inverse home prime · Base 27 sequence of
13321
Term #1 of the Inverse home prime · Base 31 sequence of
6681
Term #2 of the Conway climb · Base 2 sequence of
29156
Term #2 of the Conway climb · Base 4 sequence of
29156
Term #1 of the Conway climb · Base 6 sequence of
68773
Term #2 of the Conway climb · Base 12 sequence of
13343
Term #2 of the Conway climb · Base 14 sequence of
11185
Term #1 of the Conway climb · Base 15 sequence of
50342
Term #1 of the Conway climb · Base 22 sequence of
20273
Term #1 of the Conway climb · Base 26 sequence of
23723
Term #3 of the Conway climb · Base 28 sequence of
16886
Term #1 of the Conway climb · Base 33 sequence of
4947
Term #1 of the Conway climb · Base 36 sequence of
68773
Term #5 of the Distinct-prime home prime · Base 2 sequence of
16627
Term #1 of the Distinct-prime home prime, descending · Base 16 sequence of
39505
Term #2 of the Second-class home prime · Base 2 sequence of
19232
Term #3 of the Second-class home prime · Base 8 sequence of
24300
Term #3 of the Second-class home prime · Base 10 sequence of
61846
Term #2 of the Mid-divisor concatenation · Base 2 sequence of
51074
Term #1 of the Mid-divisor concatenation · Base 3 sequence of
52592
Term #2 of the Mid-divisor concatenation · Base 8 sequence of
50922
Term #1 of the Mid-divisor concatenation · Base 10 sequence of
53046
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '126421' --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":"126421"},"decimal":false,"detail":2}}'