factordbrpc · fdb
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Mid-divisor concatenation · Base 8 of 556 length 53 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
33 Fully factored 18 2599699139…75<18> 53×11×53×409711×8706967
34 Fully factored 18 5141969050…15<18> 3×5×821×4175370727…81<14>
35 Fully factored 19 3466406091…21<19> 23×373×727×555786969637<12>
36 Fully factored 20 2743032197…69<20> 32×7×59×271×1063×2341×10942949
37 Fully factored 20 4055009407…11<20> 331×85991×96487×14765293
38 Fully factored 20 4198169027…53<20> 107×239×6277×261532769593<12>
39 Fully factored 20 8824774963…41<20> 3×7×11×23×44119×376476752303<12>
40 Fully factored 21 1288650979…39<21> 17×290211763×26119891909<11>
41 Fully factored 21 3390344084…65<21> 3×5×103×36836563×5957117839<10>
42 Fully factored 22 1228110062…57<22> 7×11×17×313×499883×5996321887<10>
43 Fully factored 22 2010639246…37<22> 3×857×1806487×432909621581<12>
44 Fully factored 22 2553328825…57<22> 42388217×6023675932…21<14>
45 Fully factored 23 1193122245…73<23> 32×1325691383…97<22>
46 Fully factored 23 4382698972…61<23> 13×3371306902…97<22>
47 Fully factored 23 6476207117…45<23> 3×5×67×7753×713107×11655480559<11>
48 Fully factored 23 9611502301…37<23> 14560969×6600867223…73<16>
49 Fully factored 24 2623071048…69<24> 11×29×286264843×2872442584…57<13>
50 Fully factored 24 4016229439…25<24> 3×55×11393×24061691×156272657
51 Fully factored 25 2147795043…89<25> 72×47×9326074873…63<21>
52 Composite 26 1087654261…51<26> 1087654261…51<26>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (26 digits) of term #52:
10876542617536173606219151
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 '556' --type 142 --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":"556"},"type":142,"part":"last20","fr":0}}'