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
3421
Term #2 of the Inverse home prime · Base 4 sequence of
1537
Term #1 of the Inverse home prime · Base 5 sequence of
796
Term #1 of the Inverse home prime · Base 7 sequence of
1515
Term #1 of the Home prime · Base 12 sequence of
3062
Term #1 of the Home prime · Base 13 sequence of
1186
Term #1 of the Home prime · Base 30 sequence of
2435
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
3204
Term #1 of the Inverse home prime · Base 16 sequence of
3421
Term #1 of the Conway climb · Base 12 sequence of
3062
Term #1 of the Conway climb · Base 13 sequence of
1186
Term #1 of the Conway climb · Base 30 sequence of
2435
Term #1 of the Distinct-prime home prime, descending · Base 2 sequence of
3421
Term #1 of the Distinct-prime home prime, descending · Base 16 sequence of
3421
Term #3 of the Second-class home prime · Base 8 sequence of
1236
Term #4 of the Mid-divisor concatenation · Base 2 sequence of
1058
Term #2 of the Mid-divisor concatenation · Base 3 sequence of
1059
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
3411
Term #2 of the Mid-divisor concatenation · Base 10 sequence of
1052
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '4987' --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":"4987"},"decimal":false,"detail":2}}'