factordbrpc · fdb
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Inverse home prime · Base 2 of 2570 length 73 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
53 Fully factored 38 2930291220…06<38> 2×7×97×163×1323803147…39<33>
54 Fully factored 39 1388108209…46<39> 2×281×379×2920878086…77<15>×2231178758…01<19>
55 Fully factored 40 1317055473…82<40> 2×2383×50503×10712579×5107857995…21<24>
56 Fully factored 40 9201498946…46<40> 2×6211×7407421466…93<36>
57 Fully factored 41 2427263866…70<41> 2×5×11×1505652966…79<18>×1465545888…63<22>
58 Fully factored 42 2162763994…86<42> 2×7×11×1404392204…59<40>
59 Fully factored 42 7190488084…90<42> 2×5×41×69379×2527821936…41<35>
60 Fully factored 43 6785570343…22<43> 2×7×19×35865684469<11>×144171551749<12>×4933396530…07<19>
61 Fully factored 44 9542576711…42<44> 2×643×739×4483×7715603491…01<16>×2902963752…81<19>
62 Fully factored 45 8984237653…54<45> 2×59×7272581×26728806079<11>×3916797302…47<26>
63 Fully factored 46 2890086297…74<46> 2×3×53×9088321689…93<43>
64 Fully factored 46 9306441409…94<46> 2×71×1627×4028169624…91<41>
65 Fully factored 47 4223841991…26<47> 2×7×6581596715…17<20>×4584039595…77<26>
66 Fully factored 48 1082375747…70<48> 2×5×23×2006889397<10>×1142150148…27<13>×2053069150…51<24>
67 Fully factored 48 9928033222…94<48> 2×33×273500933×6722187930…17<38>
68 Fully factored 49 9238904742…26<49> 2×34×23×137×1429×125870131×1006241346…27<33>
69 Fully factored 51 2320234574…30<51> 2×3×5×11×312971×2246538453…61<43>
70 Fully factored 52 2412202296…74<52> 2×19×41×547×9221×4699283×1116058864…31<14>×5852780326…03<22>
71 Fully factored 54 1187084879…98<54> 2×192×29×5903×16339811×377037544727<12>×1558985826…81<27>
72 Composite 55 1543944780…94<55> 2×6133×1960213×6421338114…43<44>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (44 digits) of term #72:
64213381145196175162933901159756861075622143
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 '2570' --type 12 --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":"2570"},"type":12,"part":"last20","fr":0}}'