factordbrpc · fdb
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Inverse home prime · Base 13 of 7007 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 7007 72×11×13
1 Fully factored 5 30518 2×15259
2 Fully factored 6 198369 34×31×79
3 Fully factored 9 382210442 2×191105221
4 Fully factored 10 2484367875<10> 33×53×11×66919
5 Fully factored 13 4199123114…26<13> 2×3×163×431×9961907
6 Fully factored 15 6250949030…98<15> 2×43×2437999×2981357
7 Fully factored 17 3161580379…25<17> 34×52×1561274261…61<14>
8 Fully factored 20 7535972656…59<20> 1424317×5290937801…27<14>
9 Fully factored 21 2553834619…60<21> 25×3×5×197×2700755731…01<16>
10 Fully factored 27 3723221120…04<27> 22×47×197×859×42524947×275205943693<12>
11 Fully factored 31 2380645876…63<31> 63356693×3757528626…91<23>
12 Fully factored 32 3065131535…04<32> 22×3×113×167×1158454189<10>×1168406841…43<18>
13 Fully factored 35 7774773188…03<35> 11×42281×320165009×5221267295…37<21>
14 Fully factored 37 2055809455…38<37> 2×19×223×4057×507313×22225056677<11>×5303597085…91<13>
15 Fully factored 42 4865166226…06<42> 2×3×47×587×87387465251<11>×3363266885…59<26>
16 Fully factored 45 2909365740…05<45> 5×541×930698227×23943933709<11>×4826437237…47<22>
17 Composite 48 2015226038…21<48> 2015226038…21<48>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (48 digits) of term #17:
201522603885480097935840561942218964360148825921
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 '7007' --type 63 --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":"7007"},"type":63,"part":"last20","fr":0}}'