factordbrpc · fdb
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Cycle
Aliquot variants · Infinitary · σ∞(n) − n of 38680 length 21 Enters a cycle of length 1 - a fixed point. ↓ .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
1 Fully factored 5 48440 23×5×7×173
2 Fully factored 5 76840 23×5×17×113
3 Fully factored 6 107840 26×5×337
4 Fully factored 5 64540 22×5×7×461
5 Fully factored 5 46340 22×5×7×331
↳ Continues Reaches 33340 and continues as that sequence.
6 Fully factored 5 33340 22×5×1667
↳ Continues Reaches 16700 and continues as that sequence.
7 Fully factored 5 16700 22×52×167
↳ Merges Joins the sequence of 3160 (at index 2 of that sequence) - the terms below continue there.
8 Fully factored 4 5140 22×5×257
↳ Continues Reaches 2600 and continues as that sequence.
9 Fully factored 4 2600 23×52×13
10 Fully factored 4 2860 22×5×11×13
↳ Continues Reaches 2180 and continues as that sequence.
11 Fully factored 4 2180 22×5×109
↳ Continues Reaches 1120 and continues as that sequence.
12 Fully factored 4 1120 25×5×7
13 Fully factored 4 1328 24×83
↳ Continues Reaches 100 and continues as that sequence.
14 Fully factored 3 100 22×52
↳ Continues Reaches 30 and continues as that sequence.
15 Fully factored 2 30 2×3×5
16 Fully factored 2 42 2×3×7
17 Fully factored 2 54 2×33
18 Fully factored 2 66 2×3×11
19 Fully factored 2 78 2×3×13
↳ Continues Reaches 90 and continues as that sequence.
20 Fully factored 2 90 2×32×5
↳ Cycle Enters a cycle of length 1 - a fixed point.
From the command linefdb · curl
fdb
fdb seq view '38680' --type 61 --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":"38680"},"type":61,"part":"last20","fr":0}}'