factordbrpc · fdb
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Inverse home prime · Base 31 of 74 length 14 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 2 74 2×37
1 Fully factored 4 1149 3×383
2 Fully factored 5 11876 22×2969
3 Fully factored 7 2853273 3×951091
4 Fully factored 8 29483824 24×73×25243
5 Fully factored 14 2240332289…84<14> 22×23×29×8397047563<10>
6 Fully factored 16 7754849763…29<16> 3×137201×18840605543<11>
7 Fully factored 18 5393905410…27<18> 47×1787×6422156961…43<13>
8 Fully factored 21 1838609013…47<21> 69259×4641389×571959397
9 Fully factored 23 1512239035…15<23> 5×13×79×181×125339×129812106091<12>
10 Fully factored 27 1063976741…78<27> 2×5319883707…89<26>
11 Fully factored 28 1649163949…61<28> 3×157×229×367×8719×4778314173…23<16>
12 Fully factored 31 3916441460…58<31> 2×108034075561<12>×1812595442…39<20>
13 Composite 33 4792433863…62<33> 2×2396216931…81<33>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (33 digits) of term #13:
239621693199628908107809201088381
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 '74' --type 81 --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":"74"},"type":81,"part":"last20","fr":0}}'