factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Mid-divisor concatenation · Base 8 of 4938 length 11 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	4938	2×3×823
1	Fully factored	5	25399	11×2309
2	Fully factored	5	47365	5×9473
3	Fully factored	6	173313	3³×7²×131
4	Fully factored	6	201657	3×67219
5	Fully factored	6	853651	19×179×251
6	Fully factored	7	1031497	59×17483
7	Fully factored	7	1950795	3²×5×7×11×563
8	Fully factored	7	4732569	3²×443×1187
9	Fully factored	7	5447145	3×5×11×33013
10	Fully factored	8	43286773	43286773
↳	Terminates The sequence reaches a prime and terminates.

From the command linefdb · curl

fdb

fdb seq view '4938' --type 142 --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":"4938"},"type":142,"part":"last20","fr":0}}'