factordbrpc · fdb
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Inverse home prime · Base 28 of 4474 length 19 Not fully computed yet - the last known term is composite. ↓ .elf file
Show sequence-development graph
Term size (digits) across the sequence
How the sequence develops - decimal digits of each term vs iteration.
nStatus DigitsTermFactorization
0 Fully factored 4 4474 2×2237
1 Fully factored 5 62638 2×31319
2 Fully factored 6 876934 2×438467
3 Fully factored 8 12277078 2×11×19×23×1277
4 Fully factored 9 785435814 2×32×43635323
5 Fully factored 12 957882612934<12> 2×13×36841638959<11>
6 Fully factored 14 2888384494…22<14> 2×109×113×1019×1150657
7 Fully factored 18 4347205315…74<18> 2×283×17789×43175978201<11>
8 Fully factored 20 2080608526…58<20> 2×17×43×1423124846…09<17>
9 Fully factored 22 8747322258…94<22> 2×32×29×31×661×4721×288989×599413
10 Fully factored 29 8555689201…26<29> 2×11×3888949636…33<28>
11 Fully factored 31 3048936515…82<31> 2×3×2819×90017×10028587×1996814739…97<15>
12 Fully factored 35 3635383339…02<35> 2×11×13×107×359×997×3319027072…37<25>
13 Fully factored 39 9830850875…30<39> 2×3×5×562403×5826694188…47<32>
14 Fully factored 42 7861916815…26<42> 2×17×3343×108725917×6361800874…69<29>
15 Fully factored 45 5276165578…14<45> 2×33528463×6072422794…73<13>×1295724807…93<25>
16 Fully factored 48 1849444380…70<48> 2×33×5×13×2914101011<10>×1808129605…47<35>
17 Fully factored 54 1175666015…58<54> 2×32×1408645697…57<16>×5004763563…91<16>×9264588217…13<21>
18 Composite 58 1398868544…90<58> 2×32×5×1554298382…11<56>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (56 digits) of term #18:
15542983827989258753055156485943051467139918049560874511
Check for factors - let the server run a small P-1 / P+1 / ECM step on the composite:
level 0 done · takes up to a minute
From the command linefdb · curl
fdb
fdb seq view '4474' --type 78 --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":"4474"},"type":78,"part":"last20","fr":0}}'