factordbrpc · fdb
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Inverse home prime · Base 35 of 218 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 3 218 2×109
1 Fully factored 4 3817 11×347
2 Fully factored 5 12156 22×3×1013
3 Fully factored 8 43436122 2×172×75149
4 Fully factored 10 3222034797<10> 3×1074011599<10>
5 Fully factored 11 37590405968<11> 24×89×26397757
6 Fully factored 17 4852608940…22<17> 2×32×11×3623×67645945243<11>
7 Fully factored 22 4352292553…07<22> 25537×1704308475…11<18>
8 Fully factored 22 7307222587…62<22> 2×3×751×1621665021…27<19>
9 Fully factored 25 2433511073…57<25> 37×271×19993×52153×232758232379<12>
10 Fully factored 29 2247261120…37<29> 32×113×877×35951×7008450606…43<18>
11 Fully factored 32 5523755106…58<32> 2×3×1283×2521×123503272513<12>×2304651159…77<14>
12 Fully factored 39 1168675414…07<39> 23×239×821291×2588636718…41<29>
13 Fully factored 40 1665510663…88<40> 23×3×31×383×5844881465…69<34>
14 Fully factored 45 3760555638…22<45> 2×2916307×6447461872…73<38>
15 Fully factored 48 1185214752…72<48> 22×229×102291001×1823914744…63<13>×6935209939…59<24>
16 Fully factored 52 4308086459…72<52> 22×1823×25736239×2295581254…19<41>
17 Fully factored 56 6332469594…47<56> 53×83×809×2621×23075827349<11>×2942024789…73<36>
18 Composite 61 1491883934…78<61> 2×59×1264308419…21<59>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (59 digits) of term #18:
12643084192908922804112995194356218415801555870488669456021
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 '218' --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":"218"},"type":85,"part":"last20","fr":0}}'