Open
Show sequence-development graph
| n | Status | Digits | Term | Factorization |
|---|---|---|---|---|
| 0 | Fully factored | 5 | 21311 | 101×211 |
| 1 | Fully factored | 5 | 58387 | 7×19×439 |
| 2 | Fully factored | 6 | 108151 | 372×79 |
| 3 | Fully factored | 8 | 12297103 | 7×13×17×7949 |
| 4 | Fully factored | 8 | 60294413 | 61×199×4967 |
| 5 | Fully factored | 9 | 488476007 | 229×761×2803 |
| 6 | Fully factored | 11 | 43773104371<11> | 70121×624251 |
| 7 | Fully factored | 12 | 558347781755<12> | 5×2459×45412589 |
| 8 | Fully factored | 14 | 1367900533…93<14> | 13×2657×396022273 |
| 9 | Fully factored | 15 | 8364306031…29<15> | 1096673×762698273 |
| 10 | Fully factored | 16 | 5029860138…25<16> | 54×79×449×226883263 |
| 11 | Fully factored | 21 | 1097514632…35<21> | 5×2195029264…67<20> |
| 12 | Fully factored | 22 | 2546236707…87<22> | 55061×4624392414…67<17> |
| 13 | Fully factored | 23 | 4826037064…31<23> | 113×1721×2481597478…47<18> |
| 14 | Fully factored | 25 | 1370681635…39<25> | 7×370057×1556251×340008901411<12> |
| 15 | Fully factored | 28 | 1180281128…35<28> | 5×11×21407×6577610309<10>×152404862959<12> |
| 16 | Composite | 32 | 1264506965…87<32> | 59×100999×2122033034…07<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:
2122033034840390724925307
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 '21311' --type 41 --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":"21311"},"type":41,"part":"last20","fr":0}}'