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
587977
Term #1 of the Home prime · Base 18 sequence of
21461
Term #1 of the Home prime · Base 30 sequence of
4394
Term #1 of the Home prime · Base 31 sequence of
13042
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
57736
Term #1 of the Inverse home prime · Base 30 sequence of
12337
Term #2 of the Conway climb · Base 12 sequence of
750
Term #1 of the Conway climb · Base 13 sequence of
3088
Term #1 of the Conway climb · Base 18 sequence of
21461
Term #1 of the Conway climb · Base 31 sequence of
13042
Term #2 of the Second-class home prime · Base 16 sequence of
49900
Term #3 of the Mid-divisor concatenation · Base 10 sequence of
4290
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '66103' --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":"66103"},"decimal":false,"detail":2}}'