factordbrpc · fdb
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Conway climb · Base 13 of 2642 length 19 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 2642 2×1321
1 Fully factored 4 5715 32×5×127
2 Fully factored 5 91049 7×13007
3 Fully factored 6 212934 2×3×23×1543
4 Fully factored 8 10819571 7×1545653
5 Fully factored 8 35333316 22×32×981481
6 Fully factored 11 23039340838<11> 2×11519670419<11>
7 Fully factored 12 287236654117<12> 72×23×2963×86017
8 Fully factored 15 1669159203…96<15> 22×1567847×26615467
9 Fully factored 16 8578883085…50<16> 2×52×31×67×13877×5952901
10 Fully factored 20 2073979674…17<20> 6159163×3367307659…59<13>
11 Fully factored 21 1434967072…62<21> 2×3×1109×1627×1325475138…39<14>
12 Fully factored 22 3318009876…80<22> 25×5×379×2819×1940990482…23<14>
13 Fully factored 24 5967157370…17<24> 17×3042734113<10>×1153598191…77<14>
14 Fully factored 25 4270986872…51<25> 163×9059×26606201×108712004803<12>
15 Fully factored 26 4034988602…18<26> 2×32×1409×1590958363…89<22>
16 Fully factored 29 1585150973…61<29> 7×19×30391×3921696677…87<22>
17 Fully factored 31 8482382421…64<31> 22×7×11×2754020266…83<29>
18 Composite 33 4434664583…89<33> 17×43×1467223×4134731133…53<24>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (24 digits) of term #18:
413473113340087735959553
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 '2642' --type 98 --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":"2642"},"type":98,"part":"last20","fr":0}}'