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 Home prime · Base 3 sequence of
122
Term #2 of the Home prime · Base 4 sequence of
65
Term #2 of the Home prime · Base 8 sequence of
49
Term #1 of the Home prime · Base 9 sequence of
122
Term #1 of the Home prime · Base 10 sequence of
12
Term #1 of the Inverse home prime · Base 2 sequence of
117
Term #2 of the Inverse home prime · Base 4 sequence of
35
Term #1 of the Home prime · Base 30 sequence of
91
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
150
Term #1 of the Inverse home prime · Base 13 sequence of
34
Term #1 of the Inverse home prime · Base 17 sequence of
26
Term #1 of the Inverse home prime · Base 20 sequence of
33
Term #4 of the Conway climb · Base 3 sequence of
63
Term #2 of the Conway climb · Base 4 sequence of
65
Term #1 of the Conway climb · Base 8 sequence of
93
Term #3 of the Conway climb · Base 9 sequence of
106
Term #1 of the Conway climb · Base 10 sequence of
12
Term #1 of the Conway climb · Base 17 sequence of
169
Term #1 of the Conway climb · Base 30 sequence of
91
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
84
Term #1 of the Distinct-prime home prime · Base 3 sequence of
122
Term #1 of the Distinct-prime home prime · Base 8 sequence of
93
Term #1 of the Distinct-prime home prime · Base 10 sequence of
46
Term #1 of the Second-class home prime · Base 8 sequence of
126
Term #1 of the Second-class home prime · Base 10 sequence of
24
Term #1 of the Mid-divisor concatenation · Base 2 sequence of
186
Term #1 of the Mid-divisor concatenation · Base 3 sequence of
122
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
93
Term #3 of the Mid-divisor concatenation · Base 10 sequence of
8
Term #1 of the Mid-divisor concatenation · Base 16 sequence of
195
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '223' --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":"223"},"decimal":false,"detail":2}}'