factordbrpc · fdb
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Home prime · Base 31 of 1038 length 16 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 1038 2×3×173
1 Fully factored 5 62638 2×31319
2 Fully factored 7 1878361 199×9439
3 Fully factored 7 5937848 23×7×106033
4 Fully factored 11 56864064566<11> 2×28432032283<11>
5 Fully factored 13 1734214107…65<13> 3×5×23×37×3709×36629
6 Fully factored 17 8093270482…56<17> 23×132×596593×100338871
7 Fully factored 22 1564639783…66<22> 2×137×1051×4139×77549×16927369
8 Fully factored 26 4831580238…57<26> 712493×796194331×85170562079<11>
9 Fully factored 27 5393179343…03<27> 13×623209×1789496573<10>×37199484583<11>
10 Fully factored 30 2963423728…58<30> 2×6273073×34063356539<11>×693419381957<12>
11 Fully factored 32 4621419116…31<32> 19×61681×3943395617…29<26>
12 Fully factored 35 1230934163…09<35> 35×23×41×126768241×4237467639…01<21>
13 Fully factored 41 5729642498…71<41> 71647×2630750282…21<13>×3039834144…33<24>
14 Fully factored 43 1377973797…31<43> 3×13×47×39089×72671×3290821×367743799×2186820716…07<15>
15 Composite 49 1810168018…70<49> 2×5×1810168018…87<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 #15:
181016801837319747651357953336841020085834832187
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 '1038' --type 48 --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":"1038"},"type":48,"part":"last20","fr":0}}'