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 1 digits

Value

7
7
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Term #1 of the Largest prime factor · largest prime² - 2 sequence of 3 · 25 terms
Term #1 of the Largest prime factor · largest prime³ - 1 sequence of 2 · 33 terms
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of 6 · 2 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '7' --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":"7"},"decimal":false,"detail":2}}'