factordb

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.

FF · Fully factored

below threshold 1 digits

Value

2³

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Term #1 of the Home prime · Base 3 sequence of 4 · 4 terms

Term #1 of the Inverse home prime · Base 3 sequence of 4 · 4 terms

Term #1 of the Largest prime factor · largest prime² - 1 sequence of 3 · 2 terms

Term #1 of the Conway climb · Base 3 sequence of 4 · 5 terms

Term #1 of the Mid-divisor concatenation · Base 3 sequence of 4 · 8 terms

Is factor of

Algebraic factorization 1 factor · complete

These factors follow from the form of the expression and multiply to exactly this number.

2^{^3} Perfect-power base (^1) 1 dig

From the command linefdb · curl

fdb

fdb number '8' --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":"8"},"decimal":false,"detail":2}}'