mersenneforum.org Factor a 108-digit number
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 2016-12-18, 12:08 #1 sweety439     Nov 2016 44768 Posts Factor a 108-digit number Can you factor this 108-digit number? 358067153075280091687606962140031769213545967330874843089105902372932716917748288458270854167173891502700629 This number is a cofactor of Pell(361).
 2016-12-18, 13:19 #2 pinhodecarlos     "Carlos Pinho" Oct 2011 Milton Keynes, UK 112008 Posts Use Yafu.
 2016-12-18, 16:07 #3 R. Gerbicz     "Robert Gerbicz" Oct 2005 Hungary 26038 Posts It is a cofactor of Pell(361)=((1+sqrt(2))^361-(1-sqrt(2))^361)/(2*sqrt(2)) (see https://en.wikipedia.org/wiki/Pell_number), what has been already in factordb. Factorization should be easy with snfs.
2016-12-18, 18:31   #4
VBCurtis

"Curtis"
Feb 2005
Riverside, CA

112E16 Posts

Quote:
 Originally Posted by sweety439 Can you factor this 108-digit number?
Yes, yes I can. Why can't you?

2016-12-19, 11:06   #5
pepi37

Dec 2011
After milion nines:)

54416 Posts

Quote:
 Originally Posted by VBCurtis Yes, yes I can. Why can't you?
Sweety will be hapiest person on the world : if we, all, here, making his wishes, as our command, and whatever he wish, we jump, and do

 2016-12-19, 20:06 #6 carpetpool     "Sam" Nov 2016 22·79 Posts 358067153075280091687606962140031769213545967330874843089105902372932716917748288458270854167173891502700629 = 9104172185158168919441107361 * 39330006703850505769586059189807082280648538137945488453980734279873751592065589 Sweety439, my next challenge for you is to use yafu, msieve, or gmp-ecm like pinhodecarlos and I am suggesting and factor: 434500110637200403708423583711016906094707753940581510237433729028636147420998147897873135988368249681558787 (It's another 108 digit number just like your thread title says) Last fiddled with by carpetpool on 2016-12-19 at 20:07
 2016-12-21, 17:33 #7 sweety439     Nov 2016 2×7×132 Posts Thanks for find the factor 9104172185158168919441107361
2016-12-21, 18:52   #8
pepi37

Dec 2011
After milion nines:)

22×337 Posts

Quote:
 Originally Posted by carpetpool 358067153075280091687606962140031769213545967330874843089105902372932716917748288458270854167173891502700629 = 9104172185158168919441107361 * 39330006703850505769586059189807082280648538137945488453980734279873751592065589 Sweety439, my next challenge for you is to use yafu, msieve, or gmp-ecm like pinhodecarlos and I am suggesting and factor: 434500110637200403708423583711016906094707753940581510237433729028636147420998147897873135988368249681558787 (It's another 108 digit number just like your thread title says)

Dont do work for this guy: I think he is bored in ghis life, and has no other work except to post many, many messages on this forum. Some of them are interesting, but bigger part of them is totally useless. And also I doubt that he wont to learn: he rather say same thing again and again.
Many members here do work, and once in the month report results, no unnecessary topics, no unnecessary posts, there is no need to prove something and self-praise of Sweety439 is on high ranking ( in his own eyes). Rest thinks completely different.

 2016-12-21, 21:16 #9 carpetpool     "Sam" Nov 2016 22×79 Posts Okay, I have to agree with you there just from reading most of his posts. I was actually trying to educate him on some of these concepts, but now I think he should just wiki them or read about them on another source.
2016-12-21, 21:22   #10
carpetpool

"Sam"
Nov 2016

4748 Posts

Quote:
 Originally Posted by sweety439 Thanks for find the factor 9104172185158168919441107361
In order to factor my challenge number, you will need to become more resourceful and download factorization programs such as gmp-ecm or yafu. FYI You could have search the factor yourself on factordb.com. It won't work with the number I am asking you to factor, if you can.

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