factordbrpc · fdb
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Inverse home prime · Base 35 of 2855 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 2855 5×571
1 Fully factored 5 19990 2×5×1999
2 Fully factored 7 2448952 23×11×17×1637
3 Fully factored 11 86004294147<11> 32×9556032683<10>
4 Fully factored 14 1170614003…83<14> 139×1021×82484657
5 Fully factored 15 1237785396…89<15> 37×848363×3943319
6 Fully factored 16 7248868805…87<16> 9749×10061×73904183
7 Fully factored 18 1358555195…99<18> 13×193×367×2269×65024357
8 Fully factored 21 1464267494…93<21> 3×31×1315309×1197042806…89<13>
9 Fully factored 22 2200482642…38<22> 2×389×2828383859…71<19>
10 Fully factored 24 1212669579…42<24> 2×4373×1386541938…27<20>
11 Fully factored 26 2080679497…32<26> 22×196248863×2650562486…41<17>
12 Fully factored 29 5968736434…72<29> 22×31×6029×7983906327…07<23>
13 Fully factored 33 1467654055…97<33> 19×855731×1396248221<10>×6465024872…13<16>
14 Fully factored 33 6241927038…54<33> 2×3120963519…77<33>
15 Fully factored 35 1092337231…97<35> 43×53×59999×29078447×756836963×3629901637<10>
16 Composite 39 7892011317…18<39> 2×109×3620188677…51<37>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (37 digits) of term #16:
3620188677907686324126285311916820751
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 '2855' --type 85 --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":"2855"},"type":85,"part":"last20","fr":0}}'