factordbrpc · fdb
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Inverse home prime · Base 20 of 146 length 20 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 3 146 2×73
1 Fully factored 4 1462 2×17×43
2 Fully factored 5 17542 2×72×179
3 Fully factored 7 1434942 2×33×26573
4 Fully factored 10 4251705262<10> 2×7×53×5730061
5 Fully factored 12 916809781342<12> 2×7×13×12101×416281
6 Fully factored 15 5328397768…42<15> 2×2664198884…71<15>
7 Fully factored 16 5328397768…22<16> 2×23×32633×43913×80833
8 Fully factored 20 1655465460…62<20> 2×61×73×433×1134467×3784057
9 Fully factored 24 3099899784…22<24> 2×3×11×37×1269410231…91<21>
10 Fully factored 27 4062112740…62<27> 2×17×1195189×804375703×12427321229<11>
11 Fully factored 29 2036092310…42<29> 2×109×1153×23707583×3416837958…81<16>
12 Fully factored 32 1399536827…82<32> 2×7×5441×408719×4495238538…47<21>
13 Fully factored 34 4603124263…42<34> 2×32×43×11279×6483833×8132223785…19<20>
14 Fully factored 40 2664767090…62<40> 2×137047093429<12>×9722085392…39<28>
15 Fully factored 41 9955415441…82<41> 2×3×2677×7151×8667482796…11<33>
16 Fully factored 44 2218875595…62<44> 2×97×166907687×6852592158…29<33>
17 Fully factored 46 7017054370…42<46> 2×327247×1072134254…93<41>
18 Fully factored 48 6861659231…42<48> 2×32×89×149×263×827×317791290301<12>×2684240628…31<13>×1549371888…09<14>
19 Composite 54 3327250795…62<54> 2×3×47×71×22129×7509591126…49<45>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (45 digits) of term #19:
750959112651479742884578118156938491238018949
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 '146' --type 70 --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":"146"},"type":70,"part":"last20","fr":0}}'