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 Inverse home prime · Base 2 sequence of
1461
Term #1 of the Inverse home prime · Base 4 sequence of
1461
Term #2 of the Home prime · Base 12 sequence of
133
Term #1 of the Home prime · Base 19 sequence of
455
Term #1 of the Home prime · Base 24 sequence of
669
Term #1 of the Home prime · Base 26 sequence of
1198
Term #1 of the Home prime · Base 28 sequence of
494
Term #1 of the Home prime · Base 29 sequence of
538
Term #1 of the Home prime · Base 30 sequence of
302
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
1734
Term #1 of the Inverse home prime · Base 14 sequence of
695
Term #2 of the Inverse home prime · Base 20 sequence of
371
Term #2 of the Conway climb · Base 4 sequence of
1081
Term #2 of the Conway climb · Base 12 sequence of
133
Term #1 of the Conway climb · Base 19 sequence of
455
Term #1 of the Conway climb · Base 24 sequence of
669
Term #1 of the Conway climb · Base 26 sequence of
1198
Term #1 of the Conway climb · Base 28 sequence of
494
Term #1 of the Conway climb · Base 29 sequence of
538
Term #1 of the Conway climb · Base 30 sequence of
302
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
1461
Term #5 of the Distinct-prime home prime, descending · Base 2 sequence of
1267
Term #3 of the Second-class home prime · Base 3 sequence of
1712
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
930
Term #1 of the Mid-divisor concatenation · Base 10 sequence of
969
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '1951' --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":"1951"},"decimal":false,"detail":2}}'