factordb · sequences

Sequence

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Inverse home prime · Base 28 of 466 length 13 Not fully computed yet - the last known term is composite. ↓ .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	466	2×233
1	Fully factored	4	6526	2×13×251
2	Fully factored	6	197150	2×5²×3943
3	Fully factored	8	86560798	2×1117×38747
4	Fully factored	11	23816107310<11>	2×5×1637×1454863
5	Fully factored	14	2503872890…34<14>	2×167×4217×17777153
6	Fully factored	16	8566637756…74<16>	2×4283318878…87<16>
7	Fully factored	18	1199329285…38<18>	2×3²×43721893×152393687
8	Fully factored	22	1612089906…70<22>	2×5×31×59509×61339×1424650127<10>
9	Fully factored	27	3308297808…86<27>	2×3×2601509×2119473613…09<20>
10	Fully factored	30	2859790595…50<30>	2×5²×19×196650343×1530791069…43<19>
11	Fully factored	33	4534153654…90<33>	2×3×5×283×75205283×5685547799<10>×124901564503<12>
12	Composite	38	1397695099…86<38>	2×17×4110867939…79<36>
↳	Open Open - the last known term is composite and not yet fully factored.

Open end - submit a factor of the remaining composite (36 digits) of term #12:

411086793985509858714584680416928579

Check for factors - let the server run a small P-1 / P+1 / ECM step on the composite:

From the command linefdb · curl

fdb

fdb seq view '466' --type 78 --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":"466"},"type":78,"part":"last20","fr":0}}'