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 6 digits
↪
Term #1 of the aliquot sequence of 1001255 · 2 terms
Term #1 of the Home prime · Base 3 sequence of 69621 · 2 terms
Term #2 of the Home prime · Base 4 sequence of 68135 · 3 terms
Term #1 of the Home prime · Base 6 sequence of 85637 · 2 terms
Term #1 of the Inverse home prime · Base 5 sequence of 91382 · 2 terms
Term #1 of the Home prime · Base 16 sequence of 95547 · 2 terms
Term #1 of the Home prime · Base 18 sequence of 666 · 2 terms
Term #1 of the Home prime · Base 35 sequence of 33385 · 2 terms
Term #1 of the Inverse home prime · Base 34 sequence of 73909 · 2 terms
Term #1 of the Conway climb · Base 3 sequence of 45405 · 2 terms
Term #2 of the Conway climb · Base 4 sequence of 68135 · 3 terms
Term #1 of the Conway climb · Base 6 sequence of 85637 · 2 terms
Term #1 of the Conway climb · Base 16 sequence of 95547 · 2 terms
Term #1 of the Conway climb · Base 18 sequence of 888 · 2 terms
Term #1 of the Conway climb · Base 35 sequence of 33385 · 2 terms
Term #1 of the Distinct-prime home prime · Base 3 sequence of 69621 · 2 terms
Term #1 of the Distinct-prime home prime · Base 16 sequence of 95547 · 2 terms
Term #3 of the Second-class home prime · Base 10 sequence of 47256 · 4 terms
Term #9 of the Second-class home prime · Base 16 sequence of 11180 · 10 terms
Term #2 of the Mid-divisor concatenation · Base 2 sequence of 74417 · 3 terms
Term #2 of the Mid-divisor concatenation · Base 3 sequence of 97815 · 3 terms
Term #1 of the Mid-divisor concatenation · Base 16 sequence of 95547 · 2 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '228457' --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":"228457"},"decimal":false,"detail":2}}'