factordbrpc · fdb
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Inverse home prime · Base 7 of 342 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 4 6687 32×743
2 Fully factored 5 36431 17×2143
3 Fully factored 6 105024 26×3×547
4 Fully factored 9 450870184 23×56358773
5 Fully factored 11 19331059253<11> 11×1757369023<10>
6 Fully factored 11 86111082138<11> 2×3×14351847023<11>
7 Fully factored 12 703240504150<12> 2×52×14064810083<11>
8 Fully factored 13 4824229858…51<13> 431×11193108721<11>
9 Fully factored 14 2687465403…52<14> 29×3×11×1637×971651
10 Fully factored 20 3229083288…50<20> 2×3×52×17×23×16871×32634007207<11>
11 Fully factored 23 2213313664…41<23> 31×12725345431<11>×56106307981<11>
12 Fully factored 23 3805259260…19<23> 3×17×53×97×1451330999…09<18>
13 Fully factored 25 5856644077…17<25> 3×79×41611×81712991×7267770841<10>
14 Fully factored 27 5799119063…67<27> 154079131×3763727784…57<19>
15 Fully factored 28 1063159943…24<28> 23×3×12540798443<11>×3532337367…07<16>
16 Fully factored 30 1173899224…93<30> 3×8659663×549267227×8226685275…31<13>
17 Fully factored 31 4594981035…84<31> 23×232×83×97×1348615781…37<24>
18 Fully factored 35 1306660485…45<35> 5×443×2239×2399×1098258784…43<25>
19 Fully factored 36 1064092068…73<36> 269×72688823×5442009420…79<25>
20 Composite 36 5272709073…11<36> 3×61403×2862351499…79<31>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (31 digits) of term #20:
2862351499314067742750914409879
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 '342' --type 17 --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":"342"},"type":17,"part":"last20","fr":0}}'