Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 2 | 16 | 24 |
| 1 | Fully factored | 2 | 56 | 23×7 |
| 2 | Fully factored | 4 | 1437 | 3×479 |
| 3 | Fully factored | 4 | 2507 | 23×109 |
| 4 | Fully factored | 5 | 15657 | 3×17×307 |
| 5 | Fully factored | 5 | 64527 | 3×137×157 |
| 6 | Fully factored | 7 | 1463697 | 33×23×2357 |
| 7 | Fully factored | 8 | 37421661 | 3×2339×5333 |
| 8 | Fully factored | 9 | 967862925 | 35×52×159319 |
| 9 | Fully factored | 11 | 25700489559<11> | 32×2855609951<10> |
| 10 | Fully factored | 12 | 645400424031<12> | 3×11×311×821×76597 |
| 11 | Fully factored | 15 | 4857240956…93<15> | 15868199×30609907 |
| 12 | Fully factored | 16 | 4901937038…31<16> | 32×11×4951451553…69<14> |
| 13 | Fully factored | 18 | 2952299115…85<18> | 5×59×1000779361…23<16> |
| 14 | Fully factored | 20 | 1262331547…87<20> | 353×1201×1403813×21210283 |
| 15 | Fully factored | 23 | 2277642958…75<23> | 52×11×5505556513<10>×15043598249<11> |
| 16 | Fully factored | 25 | 5775953624…05<25> | 5×19×79×25196797×3054412328…13<14> |
| 17 | Composite | 28 | 4395895667…13<28> | 32×19×83×3097227976…41<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 #17:
309722797678419755771741
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 '16' --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":"16"},"type":111,"part":"last20","fr":0}}'