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.
↪
Term #1 of the Inverse home prime · Base 2 sequence of
1233
Term #2 of the Inverse home prime · Base 4 sequence of
323
Term #1 of the Inverse home prime · Base 6 sequence of
671
Term #3 of the Largest prime factor · largest prime² - 2 sequence of
3
Term #1 of the Home prime · Base 24 sequence of
1311
Term #1 of the Home prime · Base 26 sequence of
537
Term #1 of the Home prime · Base 30 sequence of
442
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
1700
Term #2 of the Inverse home prime · Base 30 sequence of
451
Term #1 of the Inverse home prime · Base 36 sequence of
671
Term #1 of the Conway climb · Base 24 sequence of
1311
Term #1 of the Conway climb · Base 26 sequence of
537
Term #1 of the Conway climb · Base 30 sequence of
442
Term #1 of the Conway climb · Base 32 sequence of
496
Term #2 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
1010
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '2207' --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":"2207"},"decimal":false,"detail":2}}'