factordbrpc · fdb
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Inverse home prime · Base 15 of 3493 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 421457 29×14533
3 Fully factored 7 3269954 2×149×10973
4 Fully factored 8 37036112 24×37×73×857
5 Fully factored 13 2197230661…07<13> 73×1063×28315193
6 Fully factored 14 2150184992…23<14> 373×12043×4786657
7 Fully factored 15 8178452640…73<15> 13×6291117415…21<14>
8 Fully factored 15 9436676123…28<15> 24×72×173×23971×290249
9 Fully factored 20 3765880626…57<20> 13×23×761×4190503×39495221
10 Fully factored 22 5124360336…33<22> 2683×916169×2084699180…79<13>
11 Fully factored 23 8014283978…83<23> 232×761×1229×6109423×26513821
12 Fully factored 27 1741536069…98<27> 2×43×367625804863<12>×5508432526…11<13>
13 Fully factored 29 1072048421…97<29> 6185503×1733162883…99<22>
14 Fully factored 29 1974180847…78<29> 2×132×240287×37039577×6562569872…69<13>
15 Fully factored 31 2873709252…47<31> 7×13×19×1831×10499×15679×5514335590…93<16>
16 Fully factored 34 2414693864…77<34> 23×911683×1251923×9274253×9918222083…87<13>
17 Fully factored 37 3298063473…73<37> 13×41×191×2551×1269953954…41<29>
18 Fully factored 38 3254753084…03<38> 37×647×863×3349033×4704157130…63<24>
19 Fully factored 41 1373281111…37<41> 31×10684543×4146119369…89<32>
20 Fully factored 42 1062605046…31<42> 229×2083×6046871×43204639801<11>×8526799071…23<18>
21 Composite 44 6379604099…29<44> 6379604099…29<44>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (44 digits) of term #21:
63796040993391638542352665724349911826702229
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 '3493' --type 65 --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":"3493"},"type":65,"part":"last20","fr":0}}'