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 4 digits
↪
Term #1 of the Home prime · Base 6 sequence of 1065 · 2 terms
Term #1 of the Inverse home prime · Base 2 sequence of 3777 · 2 terms
Term #1 of the Inverse home prime · Base 4 sequence of 3777 · 2 terms
Term #1 of the Inverse home prime · Base 6 sequence of 1265 · 2 terms
Term #2 of the Largest prime factor · largest prime² - 2 sequence of 59 · 18 terms
Term #1 of the Home prime · Base 12 sequence of 3166 · 2 terms
Term #1 of the Home prime · Base 26 sequence of 2149 · 2 terms
Term #1 of the Home prime · Base 30 sequence of 2465 · 2 terms
Term #1 of the Home prime · Base 31 sequence of 595 · 2 terms
Term #1 of the Home prime · Base 36 sequence of 3453 · 2 terms
Term #1 of the Inverse home prime · Base 12 sequence of 4609 · 2 terms
Term #2 of the Inverse home prime · Base 14 sequence of 1265 · 3 terms
Term #1 of the Inverse home prime · Base 17 sequence of 833 · 2 terms
Term #1 of the Inverse home prime · Base 20 sequence of 4769 · 2 terms
Term #1 of the Inverse home prime · Base 30 sequence of 4843 · 2 terms
Term #1 of the Conway climb · Base 6 sequence of 1065 · 2 terms
Term #1 of the Conway climb · Base 12 sequence of 3166 · 2 terms
Term #2 of the Conway climb · Base 26 sequence of 1377 · 3 terms
Term #1 of the Conway climb · Base 30 sequence of 2465 · 2 terms
Term #1 of the Conway climb · Base 31 sequence of 595 · 2 terms
Term #1 of the Conway climb · Base 36 sequence of 3453 · 2 terms
Term #6 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of 676 · 7 terms
Term #1 of the Distinct-prime home prime, descending · Base 2 sequence of 3777 · 2 terms
Term #5 of the Second-class home prime · Base 2 sequence of 4212 · 6 terms
Term #3 of the Second-class home prime · Base 3 sequence of 3804 · 4 terms
Term #1 of the Mid-divisor concatenation · Base 2 sequence of 3879 · 2 terms
Term #1 of the Mid-divisor concatenation · Base 3 sequence of 3580 · 2 terms
Term #1 of the Mid-divisor concatenation · Base 8 sequence of 3879 · 2 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '5039' --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":"5039"},"decimal":false,"detail":2}}'