Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 5 | 25255 | 5×5051 |
| 1 | Fully factored | 5 | 35362 | 2×17681 |
| 2 | Fully factored | 6 | 123769 | 61×2029 |
| 3 | Fully factored | 6 | 696008 | 23×192×241 |
| 4 | Fully factored | 9 | 198799827 | 3×66266609 |
| 5 | Fully factored | 9 | 463866266 | 2×19×12207007 |
| 6 | Fully factored | 10 | 4187003536<10> | 24×23×307×37061 |
| 7 | Fully factored | 13 | 1495581203…93<13> | 23831×62757803 |
| 8 | Fully factored | 13 | 7383392788…78<13> | 2×43×85853404523<11> |
| 9 | Fully factored | 14 | 2944771775…92<14> | 22×17×19×71×321019031 |
| 10 | Fully factored | 17 | 1295427582…64<17> | 22×3238568956…91<16> |
| 11 | Fully factored | 18 | 1586898788…75<18> | 33×52×6599×38189×932887 |
| 12 | Fully factored | 20 | 3100257968…32<20> | 23×3×3361×3843422057…63<15> |
| 13 | Fully factored | 23 | 1550959432…45<23> | 5×4549×2652313×257092686997<12> |
| 14 | Fully factored | 24 | 1743661921…38<24> | 2×353×2469776093…23<21> |
| 15 | Composite | 25 | 4150952679…34<25> | 2×32×2306084822…63<24> |
| ↳ | Open Open - the last known term is composite and not yet fully factored. | |||
Open end - submit a factor of the remaining composite
(24 digits) of term #15:
230608482216713270059163
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 '25255' --type 17 --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":"25255"},"type":17,"part":"last20","fr":0}}'