factordbrpc · fdb
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Home prime · Base 13 of 1959 length 25 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
5 Fully factored 8 17936860 22×5×37×24239
6 Fully factored 10 1782173517<10> 3×10163×58453
7 Fully factored 11 35587007331<11> 3×21347×555691
8 Fully factored 12 516613922961<12> 3×23831×7226077
9 Fully factored 13 6871848316…15<13> 3×5×458123221121<12>
10 Fully factored 14 7931318055…49<14> 59×6043×222454277
11 Fully factored 16 1379516705…59<16> 29×677×29723×2364001
12 Fully factored 18 1153973512…38<18> 2×7×8242667945…67<16>
13 Fully factored 19 1697377137…48<19> 22×199×9811×84467×2573149
14 Fully factored 22 3158954970…14<22> 2×3×5264924951…69<21>
15 Fully factored 23 4292218091…02<23> 2×32×443×659×8168082861…97<16>
16 Fully factored 26 9393437253…47<26> 37×2538766825…31<25>
17 Fully factored 27 1213768053…84<27> 23×3×43×1176131834…87<24>
18 Fully factored 30 1988010850…63<30> 32×86752399×2546213096…93<21>
19 Fully factored 32 5021322337…30<32> 2×3×5×73×7757×257489×1147946146…09<20>
20 Fully factored 35 7707494314…46<35> 2×5581×229949×3002891700…17<26>
21 Fully factored 36 9720899968…33<36> 3×47×41443×49747×3344023185…53<25>
22 Fully factored 40 3189538747…77<40> 19×1567×347272733×3084853897…53<27>
23 Fully factored 41 1917695841…76<41> 25×67×4621×1935614990…49<34>
24 Composite 45 7825783221…03<45> 2297×3406958302…99<42>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (42 digits) of term #24:
340695830291074694785082128213190447028299
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 '1959' --type 31 --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":"1959"},"type":31,"part":"last20","fr":0}}'