factordbrpc · fdb
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Distinct-prime home prime, descending · Base 2 of 2854 length 57 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
37 Fully factored 19 3398985704…54<19> 2×71×131×128669×1420089683<10>
38 Fully factored 20 2439695500…98<20> 2×19×47×79×1729127744…17<15>
39 Fully factored 21 1813121853…54<21> 2×373×471791×515155704389<12>
40 Fully factored 21 5531442256…98<21> 2×33×43×2382188741…59<18>
41 Fully factored 21 2439361270…18<21> 2×1219680635…59<21>
42 Fully factored 21 4878722541…38<21> 2×17×2267×6329591506…21<16>
43 Fully factored 22 3318528871…94<22> 2×3×7×95923×22575727×36486467
44 Fully factored 23 2054005527…06<23> 2×109470877×9381515814…39<14>
45 Fully factored 23 5036662951…78<23> 2×37×227×619363×4841055423…47<13>
46 Fully factored 24 3326747955…22<24> 2×101226119×1643226070…69<16>
47 Fully factored 24 8822002792…06<24> 2×3×3465047×4243330029…83<17>
48 Fully factored 25 2847650578…78<25> 2×32×29×5455269307…99<22>
49 Fully factored 25 2793097885…66<25> 2×61×107×317×6749681583…37<18>
50 Fully factored 26 1132408658…86<26> 2×12829×42473×8249081×1259684759<10>
51 Fully factored 26 4538492652…34<26> 2×7×13×23×313×3463921769…63<20>
52 Fully factored 27 2905748186…18<27> 2×1452874093…59<27>
53 Fully factored 27 5811496372…38<27> 2×3×103×691×1360885067…01<22>
54 Fully factored 28 2853982840…82<28> 2×3×31×5171×14759×100546757×1999580419<10>
55 Fully factored 29 1844287412…02<29> 2×11×87443×9586959052…87<22>
56 Composite 29 8042124140…94<29> 2×13×29×1066594713…11<27>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (27 digits) of term #56:
106659471354765788933113711
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 '2854' --type 130 --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":"2854"},"type":130,"part":"last20","fr":0}}'