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
650305
Term #1 of the Home prime · Base 6 sequence of
31250
Term #1 of the Home prime · Base 10 sequence of
129571
Term #2 of the Inverse home prime · Base 2 sequence of
40217
Term #1 of the Inverse home prime · Base 3 sequence of
12224
Term #2 of the Inverse home prime · Base 4 sequence of
40217
Term #1 of the Inverse home prime · Base 5 sequence of
30774
Term #1 of the Inverse home prime · Base 6 sequence of
53125
Term #2 of the Inverse home prime · Base 10 sequence of
8433
Term #1 of the Home prime · Base 16 sequence of
1528
Term #1 of the Home prime · Base 20 sequence of
67439
Term #1 of the Home prime · Base 22 sequence of
20059
Term #1 of the Home prime · Base 23 sequence of
37631
Term #1 of the Home prime · Base 30 sequence of
11675
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
71712
Term #2 of the Inverse home prime · Base 18 sequence of
81601
Term #1 of the Inverse home prime · Base 25 sequence of
87193
Term #1 of the Conway climb · Base 20 sequence of
67439
Term #1 of the Conway climb · Base 22 sequence of
20059
Term #1 of the Conway climb · Base 30 sequence of
24835
Term #1 of the Conway climb · Base 34 sequence of
24909
Term #4 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
31572
Term #1 of the Distinct-prime home prime, descending · Base 2 sequence of
91833
Term #1 of the Distinct-prime home prime, descending · Base 10 sequence of
93733
Term #2 of the Second-class home prime · Base 2 sequence of
48400
Term #1 of the Second-class home prime · Base 16 sequence of
3056
Term #4 of the Mid-divisor concatenation · Base 10 sequence of
5136
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '139967' --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":"139967"},"decimal":false,"detail":2}}'