factordbrpc · fdb
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Inverse home prime · Base 17 of 9 length 21 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
1 Fully factored 2 54 2×33
2 Fully factored 5 15659 7×2237
3 Fully factored 5 38036 22×37×257
4 Fully factored 8 21475626 2×3×3579271
5 Fully factored 10 1034409372<10> 22×3×269×320449
6 Fully factored 12 454993078293<12> 32×13×16361×237689
7 Fully factored 14 9753306923…01<14> 3×137×163×1455869557<10>
8 Fully factored 16 2067126582…00<16> 22×53×4134253164…93<13>
9 Fully factored 19 5870048295…52<19> 22×79×1783×2027×5139838817<10>
10 Fully factored 23 1036188370…14<23> 2×1669×17011×3325381×54875833
11 Fully factored 25 9239873514…84<25> 23×3583×3223511552…31<21>
12 Fully factored 28 7780773252…32<28> 23×3×41×79×65027×1539241808…81<19>
13 Fully factored 33 8967965062…13<33> 7×5946078752…89<13>×2154592832…31<20>
14 Fully factored 35 1255313696…11<35> 89×5347×73877×3570613356…21<24>
15 Fully factored 36 7198334747…14<36> 2×197×15565219×137784499×374844097×2272634233<10>
16 Fully factored 38 4537898065…87<38> 12911×117209×2998706039…13<29>
17 Fully factored 40 3556101814…61<40> 3×40054961×1061268497<10>×2788504476…11<23>
18 Fully factored 43 1356919513…08<43> 23×341603×2491733837<10>×1992694743…91<27>
19 Fully factored 46 9696690127…41<46> 32×11×13×23×58928417×78016321×7125361340…13<26>
20 Composite 51 2895911734…48<51> 22×3×149×22391×48523×446461×3338974825…27<33>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (33 digits) of term #20:
333897482599282014620444911713227
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 '9' --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":"9"},"type":67,"part":"last20","fr":0}}'