factordbrpc · fdb
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Inverse home prime · Base 33 of 1807 length 17 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
0 Fully factored 4 1807 13×139
1 Fully factored 4 4600 23×52×23
2 Fully factored 9 906225575 52×1777×20399
3 Fully factored 12 798324817130<12> 2×5×29×2752844197<10>
4 Fully factored 14 9892896193…37<14> 139309×710140493
5 Fully factored 15 8421705237…62<15> 2×7×13×21569×214535239
6 Fully factored 18 2770653901…34<18> 2×132×2222141×368887523
7 Fully factored 21 5188065915…48<21> 22×17×1403411×5436403662…01<13>
8 Fully factored 25 7645804962…29<25> 5407×7544567×1874271606…41<15>
9 Fully factored 27 2635991740…67<27> 5101×13721×8750447×430400451841<12>
10 Fully factored 29 2175334548…18<29> 2×131×11348871181<11>×7315973092…69<16>
11 Fully factored 32 1120499064…03<32> 250751×238064801881<12>×1877040465…13<15>
12 Fully factored 33 3130696111…45<33> 5×7×2999×16493×1808409354…61<24>
13 Fully factored 36 2543362500…97<36> 1287539437<10>×1975366678…81<27>
14 Fully factored 36 2551122792…26<36> 2×17×2542178488…57<16>×2951524593…77<19>
15 Fully factored 39 1624529584…37<39> 13×23×151×457×1367×4266231095…01<13>×1350051692…27<16>
16 Composite 43 2908046290…27<43> 409×1356763×5240515573…81<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 #16:
5240515573192316741333063891765281
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 '1807' --type 83 --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":"1807"},"type":83,"part":"last20","fr":0}}'