Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 5 | 28873 | 13×2221 |
| 1 | Fully factored | 5 | 37893 | 3×17×743 |
| 2 | Fully factored | 7 | 1660863 | 3×67×8263 |
| 3 | Fully factored | 8 | 25170743 | 13×79×24509 |
| 4 | Fully factored | 9 | 100943341 | 97×347×2999 |
| 5 | Fully factored | 11 | 10238443239<11> | 3×17×200753789 |
| 6 | Fully factored | 12 | 893053132669<12> | 32237×27702737 |
| 7 | Fully factored | 13 | 3398242831…85<13> | 3×5×7369×30743591 |
| 8 | Fully factored | 15 | 1911063858…75<15> | 52×17×71×6333268793<10> |
| 9 | Fully factored | 17 | 5959892386…45<17> | 5×11×61×1776420979…79<14> |
| 10 | Fully factored | 18 | 9035486457…31<18> | 13×17×137×75967×392838209 |
| 11 | Fully factored | 21 | 3991410161…49<21> | 29×94903×12022783×12062669 |
| 12 | Fully factored | 24 | 1743673788…85<24> | 32×5×3874830641…13<22> |
| 13 | Fully factored | 25 | 3798827844…53<25> | 3×61×1511×4831×321301×8850849251<10> |
| 14 | Fully factored | 27 | 7608548364…83<27> | 3×13×23×712×31431479×5353377237…01<13> |
| 15 | Composite | 31 | 2480297832…25<31> | 3×52×271×1220318736…69<27> |
| ↳ | Open Open - the last known term is composite and not yet fully factored. | |||
Open end - submit a factor of the remaining composite
(27 digits) of term #15:
122031873682829443334092769
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 '28873' --type 32 --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":"28873"},"type":32,"part":"last20","fr":0}}'