Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 4 | 7239 | 3×19×127 |
| 1 | Fully factored | 5 | 41267 | 29×1423 |
| 2 | Fully factored | 6 | 310215 | 3×5×20681 |
| 3 | Fully factored | 8 | 16652857 | 13×1280989 |
| 4 | Fully factored | 8 | 68278205 | 5×17×803273 |
| 5 | Fully factored | 9 | 655314537 | 3×29×7532351 |
| 6 | Fully factored | 12 | 167923170175<12> | 52×83×8429×9601 |
| 7 | Fully factored | 13 | 6155598129…57<13> | 3×2051866043…19<13> |
| 8 | Fully factored | 14 | 8173163441…91<14> | 47×853763×2036831 |
| 9 | Fully factored | 16 | 1252716353…75<16> | 3×52×691×24172047343<11> |
| 10 | Fully factored | 18 | 9139117668…11<18> | 32×25943087×3914173817<10> |
| 11 | Fully factored | 21 | 4245074961…41<21> | 3×373×1861×2038491495…99<15> |
| 12 | Fully factored | 23 | 1135591144…07<23> | 3×3785303814…69<22> |
| 13 | Fully factored | 24 | 2025351625…05<24> | 5×7×5786718930…23<22> |
| 14 | Fully factored | 25 | 7757031210…27<25> | 73×151×1231691×1388327×411530657 |
| 15 | Fully factored | 28 | 2350762912…85<28> | 5×4701525825…17<27> |
| 16 | Composite | 28 | 3997300075…97<28> | 3×883×1508984551…53<25> |
| ↳ | Open Open - the last known term is composite and not yet fully factored. | |||
Open end - submit a factor of the remaining composite
(25 digits) of term #16:
1508984551151059931763253
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 '7239' --type 107 --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":"7239"},"type":107,"part":"last20","fr":0}}'