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.
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See the expression syntax & functions reference.
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Term #1 of the aliquot sequence of
781579
Term #1 of the Home prime · Base 7 sequence of
3751
Term #1 of the Inverse home prime · Base 2 sequence of
15577
Term #1 of the Inverse home prime · Base 4 sequence of
15577
Term #1 of the Inverse home prime · Base 8 sequence of
15577
Term #1 of the Home prime · Base 18 sequence of
7387
Term #1 of the Home prime · Base 20 sequence of
3801
Term #1 of the Home prime · Base 23 sequence of
5294
Term #1 of the Home prime · Base 30 sequence of
25549
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
23094
Term #1 of the Inverse home prime · Base 30 sequence of
9251
Term #1 of the Conway climb · Base 6 sequence of
9549
Term #1 of the Conway climb · Base 18 sequence of
7387
Term #1 of the Conway climb · Base 20 sequence of
3801
Term #1 of the Conway climb · Base 23 sequence of
5294
Term #1 of the Conway climb · Base 30 sequence of
25549
Term #1 of the Distinct-prime home prime, descending · Base 2 sequence of
15577
Term #1 of the Distinct-prime home prime, descending · Base 8 sequence of
15577
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '26981' --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":"26981"},"decimal":false,"detail":2}}'