factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Prime-stopping maps · σ(n) − 1 until a prime of 600 length 5 The sequence reaches a prime. ↓ .elf file

Show sequence-development graph

Term size (digits) across the sequence — How the sequence develops - decimal digits of each term vs iteration.

n	Status	Digits	Term	Factorization
0	Fully factored	3	600	2³×3×5²
1	Fully factored	4	1859	11×13²
2	Fully factored	4	2195	5×439
3	Fully factored	4	2639	7×13×29
4	Fully factored	4	3359	3359
↳	Terminates The sequence reaches a prime and terminates.

From the command linefdb · curl

fdb

fdb seq view '600' --type 122 --part last20

curl

curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"sequence_view","params":{"start":{"expr":"600"},"type":122,"part":"last20","fr":0}}'