factordbrpc · fdb
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Home prime · Base 19 of 2209 length 17 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 2209 472
1 Fully factored 5 17014 2×47×181
2 Fully factored 6 277790 2×5×27779
3 Fully factored 7 5631582 2×3×112×7757
4 Fully factored 10 1957559498<10> 2×978779749
5 Fully factored 11 34945905831<11> 3×91121×127837
6 Fully factored 11 62825796801<11> 34×1753×442457
7 Fully factored 15 3688873302…24<15> 22×33×67×50979454159<11>
8 Fully factored 20 3209343746…09<20> 3×61×1753739752…23<18>
9 Fully factored 21 9142390225…47<21> 31×370261×475207×167612831
10 Fully factored 24 1707114972…34<24> 2×15707701×25881103×209960389
11 Fully factored 25 4617395024…23<25> 7481×189493×3706309×878825359
12 Fully factored 27 7789846763…18<27> 2×20704459903<11>×1881200185…53<17>
13 Fully factored 29 2801064514…52<29> 22×11×13×4896965934…91<26>
14 Fully factored 32 1047178859…69<32> 33×17×71×109×2947971861…69<25>
15 Fully factored 36 1064706811…23<36> 3×11×6793×4749572024…67<30>
16 Composite 37 2318119587…72<37> 23×7×4139499263…87<35>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (35 digits) of term #16:
41394992637545177556964839973114087
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 '2209' --type 36 --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":"2209"},"type":36,"part":"last20","fr":0}}'