factordbrpc · fdb
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Inverse home prime · Base 24 of 886 length 22 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
2 Fully factored 6 235898 2×13×43×211
3 Fully factored 8 70029818 2×35014909
4 Fully factored 9 840357818 2×67×6271327
5 Fully factored 11 86694826058<11> 2×19×2281442791<10>
6 Fully factored 13 1314111048…74<13> 2×11×2053×29095139
7 Fully factored 15 2316736532…30<15> 2×5×182011×127285523
8 Fully factored 17 2432464235…06<17> 2×23×12361493×42777727
9 Fully factored 19 4708771746…74<19> 2×7×1297×13903×15817×1179253
10 Fully factored 25 1033601544…94<25> 2×269×4253×4517264193…21<18>
11 Fully factored 26 8632626308…26<26> 2×13×28961×1146452431…41<21>
12 Fully factored 29 2190904715…66<29> 2×7×59×56681×825961×5665606369…01<15>
13 Fully factored 33 4965837913…70<33> 2×5×11×61×723043×1023542531…09<24>
14 Fully factored 37 6489605707…38<37> 2×2917×9679×1149268216…83<30>
15 Fully factored 39 5271085833…06<39> 2×7×653437079×5761933980…01<29>
16 Fully factored 42 1522192063…98<42> 2×29×641×4094335530…41<37>
17 Fully factored 45 7824397047…98<45> 2×139×349×10427×21220073027<11>×29223243437<11>×1247228407…83<16>
18 Fully factored 49 1663473149…34<49> 2×7×47×63389×3988191476…57<41>
19 Fully factored 52 4390014297…38<52> 2×40277×963979×15557197×150072288439<12>×2421471682…21<23>
20 Fully factored 57 7751048197…86<57> 2×7×37×137×14621×119255399×43962957293<11>×3905126409…69<13>×3648656578…97<17>
21 Composite 64 3085426508…98<64> 2×13×1186702503…73<63>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (63 digits) of term #21:
118670250329855497651750979178908838384174790871012983202568073
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 '886' --type 74 --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":"886"},"type":74,"part":"last20","fr":0}}'