Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 3 | 208 | 24×13 |
| 1 | Fully factored | 4 | 1469 | 13×113 |
| 2 | Fully factored | 4 | 8901 | 32×23×43 |
| 3 | Fully factored | 7 | 1421671 | 167×8513 |
| 4 | Fully factored | 7 | 2943705 | 3×5×196247 |
| 5 | Fully factored | 8 | 38125255 | 5×7×677×1609 |
| 6 | Fully factored | 11 | 42333361873<11> | 11×23×113×1480757 |
| 7 | Fully factored | 13 | 2483173420…29<13> | 3×11×6221×12095753 |
| 8 | Fully factored | 15 | 4851476045…13<15> | 61×7953239419…33<13> |
| 9 | Fully factored | 16 | 8619146074…69<16> | 3×71×4679×8648316847<10> |
| 10 | Fully factored | 19 | 7705030188…75<19> | 52×11×19×2399×9551×64358951 |
| 11 | Fully factored | 22 | 8544435520…63<22> | 37×53×113×9394537×4104421543<10> |
| 12 | Fully factored | 25 | 1616953374…83<25> | 17×5647×1684343977…17<20> |
| 13 | Fully factored | 26 | 1963936903…81<26> | 32×461×2750831×1720759540…99<16> |
| 14 | Fully factored | 28 | 2378474542…71<28> | 3×2803909×2827569823…73<21> |
| 15 | Fully factored | 29 | 6448732953…85<29> | 5×7×23×8010848389…97<26> |
| 16 | Composite | 31 | 2747865254…57<31> | 19×47×3077116746…49<28> |
| ↳ | Open Open - the last known term is composite and not yet fully factored. | |||
Open end - submit a factor of the remaining composite
(28 digits) of term #16:
3077116746055083976831935749
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 '208' --type 111 --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":"208"},"type":111,"part":"last20","fr":0}}'