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 102825 · 2 terms
Term #1 of the Home prime · Base 2 sequence of 67387 · 2 terms
Term #1 of the Home prime · Base 4 sequence of 67387 · 2 terms
Term #1 of the Home prime · Base 5 sequence of 12475 · 2 terms
Term #2 of the Inverse home prime · Base 4 sequence of 15699 · 3 terms
Term #1 of the Inverse home prime · Base 9 sequence of 4036 · 2 terms
Term #1 of the Home prime · Base 12 sequence of 58623 · 2 terms
Term #1 of the Home prime · Base 19 sequence of 30481 · 2 terms
Term #1 of the Home prime · Base 22 sequence of 50491 · 2 terms
Term #1 of the Home prime · Base 25 sequence of 12475 · 2 terms
Term #1 of the Home prime · Base 32 sequence of 67387 · 2 terms
Term #1 of the Home prime · Base 34 sequence of 3316 · 2 terms
Term #2 of the Inverse home prime · Base 14 sequence of 1335 · 3 terms
Term #1 of the Conway climb · Base 2 sequence of 67387 · 2 terms
Term #1 of the Conway climb · Base 4 sequence of 67387 · 2 terms
Term #1 of the Conway climb · Base 12 sequence of 58623 · 2 terms
Term #1 of the Conway climb · Base 19 sequence of 30481 · 2 terms
Term #1 of the Conway climb · Base 22 sequence of 50491 · 2 terms
Term #1 of the Conway climb · Base 32 sequence of 67387 · 2 terms
Term #1 of the Conway climb · Base 34 sequence of 3316 · 2 terms
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of 43592 · 2 terms
Term #1 of the Distinct-prime home prime · Base 2 sequence of 67387 · 2 terms
Term #5 of the Mid-divisor concatenation · Base 2 sequence of 19621 · 6 terms
Term #2 of the Mid-divisor concatenation · Base 8 sequence of 12623 · 3 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '81749' --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":"81749"},"decimal":false,"detail":2}}'