Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 4 | 2149 | 7×307 |
| 1 | Fully factored | 4 | 4010 | 2×5×401 |
| 2 | Fully factored | 5 | 27380 | 22×5×372 |
| 3 | Fully factored | 8 | 13494056 | 23×17×313×317 |
| 4 | Fully factored | 9 | 320303998 | 2×7×73×313409 |
| 5 | Fully factored | 12 | 180925915139<12> | 89×2032875451<10> |
| 6 | Fully factored | 12 | 305062340234<12> | 2×1297×117603061 |
| 7 | Fully factored | 13 | 3794425474…20<13> | 22×3×5×839×75375953 |
| 8 | Fully factored | 17 | 4586827795…82<17> | 2×2293413897…91<17> |
| 9 | Fully factored | 19 | 1031006862…57<19> | 593×1109×1567744611…61<13> |
| 10 | Fully factored | 20 | 1299737133…81<20> | 112×5531×799853×24280427 |
| 11 | Fully factored | 22 | 2961443371…76<22> | 22×149×596902699×8324413219<10> |
| 12 | Fully factored | 25 | 6810177293…25<25> | 33×52×9790718713<10>×1030481197…51<13> |
| 13 | Composite | 28 | 5388834395…85<28> | 3×5×53×6778408045…03<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 #13:
6778408045275719891636503
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 '2149' --type 108 --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":"2149"},"type":108,"part":"last20","fr":0}}'