factordbrpc · fdb
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Inverse home prime · Base 26 of 3966 length 12 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 3966 2×3×661
1 Fully factored 6 446916 22×3×37243
2 Fully factored 9 654585050 2×52×7×229×8167
3 Fully factored 13 2523019916…40<13> 25×3×5×61×3323×25931
4 Fully factored 22 2474586317…58<22> 2×3×17×19×420677×3035289129…83<13>
5 Fully factored 24 6338505190…76<24> 22×3×47×83×226358291×59818187203<11>
6 Fully factored 30 1484180670…06<30> 2×79×1259607693…91<13>×7457519191…77<15>
7 Fully factored 32 7116632757…24<32> 25×31×6873406889<10>×1043736399…73<20>
8 Fully factored 39 6733140871…78<39> 2×33×87640823×1834822618…97<14>×7753957363…47<16>
9 Fully factored 45 1545220168…28<45> 22×7×15513331×8297602287…89<14>×4287209071…89<22>
10 Fully factored 49 3286005412…70<49> 2×3×5×210317×5208019977…27<42>
11 Composite 52 4182982784…04<52> 22×32×7608555011<10>×1527148927…49<41>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (41 digits) of term #11:
15271489274963444722571441619974763378649
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 '3966' --type 76 --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":"3966"},"type":76,"part":"last20","fr":0}}'