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 4319869 · 2 terms
Term #1 of the Home prime · Base 3 sequence of 61786 · 2 terms
Term #1 of the Home prime · Base 6 sequence of 20541 · 2 terms
Term #1 of the Home prime · Base 9 sequence of 61786 · 2 terms
Term #1 of the Inverse home prime · Base 2 sequence of 73269 · 2 terms
Term #1 of the Inverse home prime · Base 3 sequence of 99326 · 2 terms
Term #2 of the Inverse home prime · Base 4 sequence of 36659 · 3 terms
Term #1 of the Home prime · Base 15 sequence of 95482 · 2 terms
Term #2 of the Home prime · Base 34 sequence of 29258 · 3 terms
Term #1 of the Inverse home prime · Base 21 sequence of 97393 · 2 terms
Term #2 of the Conway climb · Base 3 sequence of 19917 · 3 terms
Term #1 of the Conway climb · Base 6 sequence of 20541 · 2 terms
Term #2 of the Conway climb · Base 9 sequence of 24343 · 3 terms
Term #1 of the Conway climb · Base 12 sequence of 18767 · 2 terms
Term #1 of the Conway climb · Base 15 sequence of 95482 · 2 terms
Term #2 of the Conway climb · Base 34 sequence of 29258 · 3 terms
Term #3 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of 53008 · 4 terms
Term #4 of the Distinct-prime home prime · Base 3 sequence of 60645 · 5 terms
Term #1 of the Distinct-prime home prime, descending · Base 3 sequence of 99326 · 2 terms
Term #2 of the Mid-divisor concatenation · Base 3 sequence of 57945 · 3 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '148991' --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":"148991"},"decimal":false,"detail":2}}'