factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Mid-divisor concatenation · Base 3 of 3905 length 7 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	4	3905	5×11×71
1	Fully factored	4	4526	2×31×73
2	Fully factored	4	5095	5×1019
3	Fully factored	5	11954	2×43×139
4	Fully factored	5	21037	109×193
5	Fully factored	5	26680	2³×5×23×29
6	Fully factored	5	35419	35419
↳	Terminates The sequence reaches a prime and terminates.

From the command linefdb · curl

fdb

fdb seq view '3905' --type 141 --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":"3905"},"type":141,"part":"last20","fr":0}}'