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.

FF · Fully factored
id #1000000000006650042 19 digits

Value

7999999999…99<19>
term 10^18*8-1
Is factor of
Algebraic factorization 2 factors · complete

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

2000000-1 Cyclotomic Φ₁ 7 dig
(2000000^3-1)/(2000000-1) Cyclotomic Φ₃ 13 dig
From the command linefdb · curl
fdb
fdb number id:1000000000006650042 --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":{"id":1000000000006650042},"decimal":false,"detail":2}}'