factordbrpc · fdb
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Inverse home prime · Base 17 of 1685 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 1685 5×337
1 Fully factored 4 5734 2×47×61
2 Fully factored 6 300494 2×150247
3 Fully factored 7 2554201 13×196477
4 Fully factored 7 3340122 2×3×556687
5 Fully factored 9 160882596 22×32×7×638423
6 Fully factored 12 906469965800<12> 23×52×7×4423×146389
7 Fully factored 17 1736006742…03<17> 7×2647×38747×24180281
8 Fully factored 18 1686757783…14<18> 2×11×137×5641×52609×188579
9 Fully factored 21 1098706858…31<21> 3×32363×28836317×39243887
10 Fully factored 23 2286436128…50<23> 2×52×19×36013×565303×1182210677<10>
11 Fully factored 27 1990580643…44<27> 23×11×919×2461396582…27<22>
12 Fully factored 31 1010006207…27<31> 3×853×54401785421<11>×7255053241…93<16>
13 Fully factored 32 7185824096…86<32> 2×32×7×5703034996…11<30>
14 Fully factored 35 4763231859…42<35> 2×29×407287×2016383710…27<28>
15 Fully factored 38 1406580367…33<38> 7×11×1750169×1043743632…41<30>
16 Composite 39 7280902412…16<39> 23×11251×33791×2393883735…97<30>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (30 digits) of term #16:
239388373575414536326758125297
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 '1685' --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":"1685"},"type":67,"part":"last20","fr":0}}'