factordbrpc · fdb
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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.

P · Proven prime
below threshold 7 digits
↪
Term #1 of the aliquot sequence of 21376175 · 2 terms
Term #1 of the Home prime · Base 3 sequence of 869797 · 2 terms
Term #2 of the Home prime · Base 4 sequence of 68360 · 3 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '5202481' --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":"5202481"},"decimal":false,"detail":2}}'