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 5 digits
↪
Term #1 of the aliquot sequence of 146451 · 2 terms
Term #1 of the Inverse home prime · Base 3 sequence of 32546 · 2 terms
Term #1 of the Inverse home prime · Base 4 sequence of 10105 · 2 terms
Term #1 of the Home prime · Base 12 sequence of 14698 · 2 terms
Term #1 of the Home prime · Base 21 sequence of 7775 · 2 terms
Term #1 of the Home prime · Base 24 sequence of 22047 · 2 terms
Term #1 of the Home prime · Base 25 sequence of 639 · 2 terms
Term #1 of the Home prime · Base 26 sequence of 27338 · 2 terms
Term #1 of the Inverse home prime · Base 26 sequence of 35663 · 2 terms
Term #1 of the Inverse home prime · Base 30 sequence of 17897 · 2 terms
Term #1 of the Conway climb · Base 2 sequence of 13032 · 2 terms
Term #2 of the Conway climb · Base 3 sequence of 21214 · 3 terms
Term #1 of the Conway climb · Base 4 sequence of 13032 · 2 terms
Term #1 of the Conway climb · Base 12 sequence of 14698 · 2 terms
Term #1 of the Conway climb · Base 24 sequence of 22047 · 2 terms
Term #1 of the Conway climb · Base 25 sequence of 1917 · 2 terms
Term #1 of the Conway climb · Base 26 sequence of 27338 · 2 terms
Term #1 of the Conway climb · Base 28 sequence of 7616 · 2 terms
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of 32546 · 2 terms
Term #1 of the Distinct-prime home prime, descending · Base 3 sequence of 32546 · 2 terms
Term #2 of the Mid-divisor concatenation · Base 3 sequence of 39277 · 3 terms
Term #2 of the Mid-divisor concatenation · Base 8 sequence of 3244 · 3 terms
Term #1 of the Mid-divisor concatenation · Base 10 sequence of 35284 · 2 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '48821' --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":"48821"},"decimal":false,"detail":2}}'