factordbrpc · fdb
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Inverse home prime · Base 2 of 1618 length 45 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
25 Fully factored 19 5309415533…14<19> 2×5076677×522922330291<12>
26 Fully factored 20 1754636177…22<20> 2×33×1423×363379×628389029
27 Fully factored 21 1727302612…70<21> 2×5×11×19×83459×990259384897<12>
28 Fully factored 22 2126565836…14<22> 2×167×6366963581…21<19>
29 Fully factored 22 6519770707…74<22> 2×3×7×6427×10949503×2205872087<10>
30 Fully factored 23 3880611215…02<23> 2×107×1813369726…93<21>
31 Fully factored 23 9284453001…46<23> 2×237873403×1951553407…41<15>
32 Fully factored 24 2095464515…98<24> 2×7×8726507×1715188411…51<16>
33 Fully factored 24 9208347666…66<24> 2×3×107×179×4003×632029×3167167651<10>
34 Fully factored 25 7131827527…22<25> 2×391840576639<12>×9100419855…49<13>
35 Fully factored 26 2001203489…06<26> 2×13×19×4051019210…49<23>
36 Fully factored 26 8296487342…22<26> 2×32×7×6584513763…97<24>
37 Fully factored 27 3371271047…74<27> 2×11×311×74861×6581956031…27<18>
38 Fully factored 28 2826928589…90<28> 2×3×5×7×31×157×367×2293×44617×144983×508097
39 Fully factored 30 1535630626…22<30> 2×19×257×698885177×2249905181…21<17>
40 Fully factored 31 1583230021…90<31> 2×5×107×353×4191655029…09<25>
41 Fully factored 31 8790537728…02<31> 2×3×8311×43933×460516169×8713149505…11<13>
42 Fully factored 32 8036461950…26<32> 2×379×295248859417<12>×3590934294…41<18>
43 Fully factored 33 4043032587…18<33> 2×7×195739945231<12>×1475365907…27<21>
44 Composite 34 1297745576…38<34> 2×3×72×7477×5903571754…01<27>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (27 digits) of term #44:
590357175432257170585798001
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 '1618' --type 12 --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":"1618"},"type":12,"part":"last20","fr":0}}'