Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 1 | 6 | 2×3 |
| 1 | Fully factored | 2 | 26 | 2×13 |
| 2 | Fully factored | 3 | 106 | 2×53 |
| 3 | Fully factored | 3 | 426 | 2×3×71 |
| 4 | Fully factored | 4 | 4570 | 2×5×457 |
| 5 | Fully factored | 5 | 29290 | 2×5×29×101 |
| 6 | Fully factored | 6 | 415594 | 2×207797 |
| 7 | Fully factored | 7 | 1662378 | 2×3×277063 |
| 8 | Fully factored | 8 | 17732058 | 2×3×191×15473 |
| 9 | Fully factored | 9 | 507031514 | 2×11×101×173×1319 |
| 10 | Fully factored | 12 | 177078585946<12> | 2×88539292973<11> |
| 11 | Fully factored | 12 | 708314343786<12> | 2×32×7×419×449×29881 |
| 12 | Fully factored | 13 | 4010677848…26<13> | 2×2005338924…13<13> |
| 13 | Fully factored | 14 | 1604271139…06<14> | 2×7×17×80923×832969 |
| 14 | Fully factored | 15 | 8943939848…10<15> | 2×5×131×599×20107×56687 |
| 15 | Fully factored | 18 | 2493147613…02<18> | 2×17×82009×89414419117<11> |
| 16 | Fully factored | 20 | 1200100018…22<20> | 2×89×6742134935…49<17> |
| 17 | Fully factored | 21 | 2761578469…18<21> | 2×13×1062145565…93<20> |
| 18 | Fully factored | 22 | 5438185293…22<22> | 2×19×79×36899×4909403373…39<14> |
| 19 | Composite | 25 | 3373716308…62<25> | 2×1686858154…81<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 #19:
1686858154472939417128781
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 '6' --type 132 --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":"6"},"type":132,"part":"last20","fr":0}}'