factordbrpc · fdb
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Inverse home prime · Base 17 of 2845 length 26 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
6 Fully factored 17 2657822382…38<17> 2×103×367×351554506819<12>
7 Fully factored 19 8485671165…35<19> 5×1038029×1634958400…23<13>
8 Fully factored 20 3946392119…85<20> 5×113×8577871×8142772039<10>
9 Fully factored 21 9656340449…32<21> 22×13×1856988547…91<20>
10 Fully factored 23 9123384736…76<23> 22×3×72×431×719×1523×11779×27910279
11 Fully factored 30 3925046126…48<30> 25×32×11×509×2434119018…29<24>
12 Fully factored 37 8342187459…89<37> 47×65059216069<11>×2728181507…23<25>
13 Fully factored 38 9349995374…47<38> 37507×305621387×8156715697…83<25>
14 Fully factored 39 2795461145…73<39> 7×8161×4893414928…99<34>
15 Fully factored 40 6947949439…87<40> 22441×3096096180…07<36>
16 Fully factored 41 2585890491…88<41> 24×3×344293×1564734646…67<34>
17 Fully factored 46 3154495503…87<46> 223×827×39367×149257×2911069081…13<31>
18 Fully factored 48 4901594848…51<48> 3×137363×1211311×9819530600…69<36>
19 Fully factored 50 3365339345…10<50> 2×5×171169×1966091608…99<44>
20 Fully factored 52 8067634216…55<52> 3×5×41×1690009×106320041×1889296317…51<13>×3864264565…43<23>
21 Fully factored 56 6444477767…01<56> 7×13×7369×484979923×4038532360…31<18>×4906710708…63<24>
22 Fully factored 60 2364880353…66<60> 2×1087×1087801450…09<57>
23 Fully factored 61 9085426496…70<61> 2×5×2539×342257×9955400571…27<15>×1050198853…97<37>
24 Fully factored 65 2096991796…91<65> 7×31×347×3701×4965558360…91<16>×1515375799…99<41>
25 Composite 68 1779904157…52<68> 22×1973×2255327113…31<64>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (64 digits) of term #25:
2255327113296219254657265235014933712906120327861573972260850231
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 '2845' --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":"2845"},"type":67,"part":"last20","fr":0}}'