P · Proven prime
Enter a value, an expression, or a term with a variable like 10^n+1 to list a range.
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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
458749
Term #1 of the Home prime · Base 6 sequence of
10379
Term #1 of the Home prime · Base 8 sequence of
2747
Term #5 of the Inverse home prime · Base 3 sequence of
537
Term #1 of the Inverse home prime · Base 6 sequence of
8245
Term #1 of the Inverse home prime · Base 7 sequence of
3477
Term #1 of the Home prime · Base 20 sequence of
10118
Term #1 of the Home prime · Base 26 sequence of
3193
Term #1 of the Home prime · Base 30 sequence of
8257
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
9180
Term #3 of the Inverse home prime · Base 22 sequence of
583
Term #2 of the Inverse home prime · Base 24 sequence of
9223
Term #2 of the Inverse home prime · Base 30 sequence of
12863
Term #1 of the Inverse home prime · Base 33 sequence of
1045
Term #1 of the Inverse home prime · Base 34 sequence of
8047
Term #1 of the Conway climb · Base 6 sequence of
10379
Term #2 of the Conway climb · Base 8 sequence of
1475
Term #1 of the Conway climb · Base 16 sequence of
1675
Term #1 of the Conway climb · Base 20 sequence of
10118
Term #1 of the Conway climb · Base 26 sequence of
3193
Term #1 of the Conway climb · Base 30 sequence of
8257
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
6120
Term #1 of the Distinct-prime home prime · Base 8 sequence of
2747
Term #5 of the Distinct-prime home prime, descending · Base 3 sequence of
537
Term #3 of the Second-class home prime · Base 8 sequence of
2046
Term #3 of the Mid-divisor concatenation · Base 3 sequence of
5707
Term #3 of the Mid-divisor concatenation · Base 8 sequence of
1748
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '21059' --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":"21059"},"decimal":false,"detail":2}}'