factordbrpc · fdb
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Aliquot variants · Bi-unitary · σ**(n) − n of 4290 length 430 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
410 Fully factored 25 3423093300…10<25> 2×33×5×1129×5827×1927152187…11<16>
411 Fully factored 25 5714808682…90<25> 2×33×5×593×33317287×1071306175…37<13>
412 Fully factored 25 9550380566…30<25> 2×33×5×31×137×379997×2105273×10410847
413 Fully factored 26 1693081598…90<26> 2×33×5×13×31×1663×9356573423…03<17>
414 Fully factored 26 3328964123…70<26> 2×32×5×13×2148337211<10>×1324404971…21<14>
415 Fully factored 26 3841112454…10<26> 2×32×5×17×41×4987×23030963×5331264977<10>
416 Fully factored 26 4493072429…70<26> 2×32×5×280561×1779400094…83<19>
417 Fully factored 26 4493104459…70<26> 2×32×5×29×971×370332341×47873495387<11>
418 Fully factored 26 4812547473…30<26> 2×32×5×11×12204645757<11>×3983039869…21<13>
419 Fully factored 26 5687556105…30<26> 2×32×5×1217473×5190675098…09<18>
420 Fully factored 26 5687565449…70<26> 2×32×5×6319517165…23<24>
421 Fully factored 26 5687565449…50<26> 2×35×53×7×31×631×773×827×10695621571<11>
422 Fully factored 27 1320459417…06<27> 2×35×7×3881420979…03<23>
423 Fully factored 27 2070349950…38<27> 2×3×7×11×4481276948…99<24>
424 Fully factored 27 3092081094…62<27> 2×3×151×1653929×2063506378…63<18>
425 Fully factored 27 3133039574…18<27> 2×3×13119875537<11>×3980016891…19<16>
426 Fully factored 27 3133039575…02<27> 2×3×9497×5498296962…61<22>
427 Fully factored 27 3133699371…10<27> 2×3×5×83×1258513803…69<24>
428 Fully factored 27 4477792113…50<27> 2×3×52×13×7879×2914460779…67<20>
429 Composite 27 5553735257…70<27> 2×3×5×13×1424034681…43<25>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (25 digits) of term #429:
1424034681283012484109143
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 '4290' --type 59 --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":"4290"},"type":59,"part":"last20","fr":0}}'