factordbrpc · fdb
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Inverse home prime · Base 14 of 1869 length 25 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
5 Fully factored 12 167171337601<12> 151×467×1123×2111
6 Fully factored 13 3115994765…51<13> 2399×1298872349<10>
7 Fully factored 13 3564105728…55<13> 3×5×612×2137×29881
8 Fully factored 15 6173888319…41<15> 32×6859875910…49<14>
9 Fully factored 17 1344535678…49<17> 1032×1267353830…61<13>
10 Fully factored 17 4868666473…67<17> 33×11×2971×91621×602221
11 Fully factored 21 4779918396…53<21> 79×42703×1416886311…69<15>
12 Fully factored 23 1493589508…43<23> 3×29×53×3239187830…13<19>
13 Fully factored 25 1742112955…53<25> 34×13×381749×4333811635…49<16>
14 Fully factored 28 1253575189…73<28> 3×41×1019166820…51<26>
15 Fully factored 29 2796593755…21<29> 3×29×30734843231<11>×1045873426…93<17>
16 Fully factored 31 8301251898…65<31> 3×5×53×509×2699×7600738604…97<22>
17 Fully factored 34 2198549022…73<34> 11×17×92503×1270980037…93<27>
18 Fully factored 36 1875698430…89<36> 43×107×349×1168114338…61<30>
19 Fully factored 38 1231350254…43<38> 157×8191×13327×175433×61218128401<11>×66899256379<11>
20 Fully factored 40 3010385977…93<40> 3×17×12637×28409×47501699617<11>×3461329350…63<19>
21 Fully factored 43 4054447434…25<43> 53×6883×932587×5053060923…29<31>
22 Fully factored 46 4010689104…31<46> 17×192×653×4019081873<10>×48918503587<11>×5090373822…21<19>
23 Fully factored 51 6285425393…33<51> 3×11×29×53×131×34847×55893769×4856761550…81<32>
24 Composite 54 2902548328…65<54> 5×19×23×61×1355267×338009389×4753839945…83<34>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (34 digits) of term #24:
4753839945848999986144044386046283
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 '1869' --type 64 --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":"1869"},"type":64,"part":"last20","fr":0}}'