factordbrpc · fdb
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Inverse home prime · Base 17 of 3801 length 18 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 3801 3×7×181
1 Fully factored 5 52431 3×17477
2 Fully factored 6 297112 23×37139
3 Fully factored 9 182464521 3×59×1030873
4 Fully factored 10 5064680055<10> 3×5×9049×37313
5 Fully factored 12 900647727346<12> 2×1109×406062997
6 Fully factored 14 3391478759…92<14> 22×953×59779×148829
7 Fully factored 17 1764939994…69<17> 157×631×178156196807<12>
8 Fully factored 18 2529563231…15<18> 34×5×6245835139…83<15>
9 Fully factored 21 8868192742…96<21> 25×32×47×6551560832…11<17>
10 Fully factored 28 7769356868…58<28> 2×232073×2078117×8054905749…69<16>
11 Fully factored 31 4692967208…25<31> 54×7508747533…17<28>
12 Fully factored 33 6271381027…57<33> 19×191980127×4397312417<10>×3909903061…17<14>
13 Fully factored 35 3234429232…80<35> 23×3×5×7×12699433×3032033785…79<25>
14 Fully factored 40 1766530307…53<40> 3×47×109×1156773270…21<15>×9936358161…97<21>
15 Fully factored 42 8219755527…85<42> 5×7×331×1861×100769×3481267×165625932443<12>×656181332789<12>
16 Fully factored 48 3162587800…80<48> 24×5×72×59×179×797×17011×5634602915…17<33>
17 Composite 55 7923989665…70<55> 2×5×7923989665…17<54>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (54 digits) of term #17:
792398966571751287387716581938252399601347663443177617
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 '3801' --type 67 --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":"3801"},"type":67,"part":"last20","fr":0}}'