Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 4 | 1839 | 3×613 |
| 1 | Fully factored | 5 | 18109 | 7×13×199 |
| 2 | Fully factored | 5 | 45235 | 5×83×109 |
| 3 | Fully factored | 6 | 551881 | 112×4561 |
| 4 | Fully factored | 7 | 1170961 | 11×106451 |
| 5 | Fully factored | 8 | 20891699 | 53×401×983 |
| 6 | Fully factored | 10 | 1804987487<10> | 353×5113279 |
| 7 | Fully factored | 11 | 12011428351<11> | 13×923956027 |
| 8 | Fully factored | 12 | 144183443515<12> | 5×503×1069×53629 |
| 9 | Fully factored | 14 | 1816039508…89<14> | 5009×3625553021<10> |
| 10 | Fully factored | 14 | 5520260807…05<14> | 5×7×53×29758818371<11> |
| 11 | Fully factored | 16 | 6244578578…79<16> | 3167×8369×235603373 |
| 12 | Fully factored | 18 | 2035431786…25<18> | 52×431×1889031820…47<14> |
| 13 | Fully factored | 20 | 3451054839…47<20> | 953×3621253766…99<17> |
| 14 | Fully factored | 21 | 3572333518…71<21> | 3752303×9520375935…57<14> |
| 15 | Fully factored | 22 | 4340781958…85<22> | 5×83×1045971556…59<20> |
| 16 | Fully factored | 24 | 2068219811…87<24> | 911×2270274217…17<21> |
| 17 | Fully factored | 25 | 1991592458…65<25> | 5×11×1283×5915939×4770758578…99<13> |
| 18 | Composite | 28 | 1290376762…67<28> | 1290376762…67<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 #18:
1290376762595147069748947267
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 '1839' --type 103 --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":"1839"},"type":103,"part":"last20","fr":0}}'