factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Terminates

Mid-divisor concatenation · Base 2 of 494 length 18 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	494	2×13×19
1	Fully factored	3	634	2×317
2	Fully factored	4	1341	3²×149
3	Fully factored	4	2453	11×223
4	Fully factored	4	3039	3×1013
5	Fully factored	4	4085	5×19×43
6	Fully factored	4	5599	11×509
7	Fully factored	4	6141	3×23×89
8	Fully factored	4	8921	11×811
9	Fully factored	5	12075	3×5²×7×23
10	Fully factored	5	13555	5×2711
11	Fully factored	5	23191	7×3313
12	Fully factored	5	31985	5×6397
13	Fully factored	5	47357	23×29×71
14	Fully factored	5	73371	3×37×661
15	Fully factored	6	114325	5²×17×269
16	Fully factored	6	138153	3×46051
17	Fully factored	6	242659	242659
↳	Terminates The sequence reaches a prime and terminates.

From the command linefdb · curl

fdb

fdb seq view '494' --type 140 --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":"494"},"type":140,"part":"last20","fr":0}}'