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.
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Term #1 of the aliquot sequence of
1099129
Term #3 of the Inverse home prime · Base 2 sequence of
14227
Term #1 of the Inverse home prime · Base 4 sequence of
37491
Term #2 of the Home prime · Base 22 sequence of
8149
Term #1 of the Home prime · Base 26 sequence of
46939
Term #1 of the Home prime · Base 28 sequence of
8386
Term #1 of the Home prime · Base 29 sequence of
2426
Term #1 of the Home prime · Base 34 sequence of
12169
Term #1 of the Inverse home prime · Base 12 sequence of
7981
Term #1 of the Inverse home prime · Base 18 sequence of
13885
Term #2 of the Conway climb · Base 3 sequence of
20813
Term #1 of the Conway climb · Base 12 sequence of
4048
Term #2 of the Conway climb · Base 22 sequence of
8149
Term #1 of the Conway climb · Base 26 sequence of
46939
Term #1 of the Conway climb · Base 28 sequence of
8386
Term #1 of the Conway climb · Base 29 sequence of
2426
Term #1 of the Conway climb · Base 34 sequence of
12169
Term #2 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
34801
Term #3 of the Distinct-prime home prime, descending · Base 2 sequence of
14227
Term #2 of the Second-class home prime · Base 2 sequence of
45200
Term #3 of the Second-class home prime · Base 10 sequence of
21424
Term #1 of the Mid-divisor concatenation · Base 2 sequence of
40272
Term #4 of the Mid-divisor concatenation · Base 3 sequence of
21555
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
10068
Term #1 of the Mid-divisor concatenation · Base 10 sequence of
48559
Term #1 of the Mid-divisor concatenation · Base 16 sequence of
10068
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '49991' --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":"49991"},"decimal":false,"detail":2}}'