20170919, 03:45  #12 
Sep 2017
2^{3}×3 Posts 
SIR ,
any algo use to solve this issu.. 
20170919, 11:48  #13 
Sep 2017
2^{3}·3 Posts 
Dear all exparts.
Please help me to calculate GCD ... 
20170919, 12:32  #14 
"Forget I exist"
Jul 2009
Dumbassville
2^{6}·131 Posts 
find some other software if you think it's so easy and plug it in there's many computer algebra systems.
Last fiddled with by science_man_88 on 20170919 at 13:17 
20170919, 14:11  #15 
Feb 2017
Nowhere
2^{2}×1,039 Posts 

20170919, 17:36  #16  
Bamboozled!
"πΊππ·π·π"
May 2003
Down not across
2^{2}×43×61 Posts 
Quote:
Post the public modulus and why you want it factored (that is, what does the key protect?) and a number of people here could solve your problem. I certainly could. Remember: just because they can doesn't mean they will. In other words, what's in it for me? Why should I divert resources from the things which presently interest me? Of course, I've already diverted resources, my time, in posting the above but I regard that as a relatively small but speculative investment which may yield a worthwhile return. 

20170919, 21:46  #17 
Apr 2012
362_{10} Posts 

20170920, 03:04  #18  
Jun 2003
2^{3}·5·11^{2} Posts 
Quote:


20170920, 13:28  #19 
Sep 2017
2^{3}×3 Posts 
Z1:= (7580104959982914109394378405621081680045277328933902877018950173722431866047182165909685701898461476201769271496346873969218041590426190558248064238412(5542744080416549313204339685348101804092633280776996094712323671936025724303663565120968650288374354487920966943136994524637343823470109069100536001825061^65537));
Z2:= (7580104959982914109394378405621081680045277328933902557064898247755957479231576299665165903124564064889635003580310606233252493957322555511313835652894(2210052959863233666352631743605544948489669349588589762935731382353706272687862251429121203091727087209430630578779213774169437578222468020592099358198793^65537)); Z3:= (7580104959982914380707737866198974081289603526426728444663905520185161944615556517456155284414829089801734045676331442459189567878379004868410811939884(7769917532858189300573807160645252136211403803199106971490637897656073492246460627329132405022210291064618462659663590068082649667914372368725493336150572^65537)); ToUpperCase[IntegerString[(GCD[Z1,Z2,Z3]),16]] ruselt512:BDDA237EB5F92257D6D114DA2F28FB442A1EE793813902905374CCF24F2DE4AA3560931BB8718B3EA665AEDBC7FE20AB30293BF85765E72695A7A085513B547B this string give rsa 512 Last fiddled with by crack11 on 20170920 at 13:30 
20170920, 17:32  #20  
Bamboozled!
"πΊππ·π·π"
May 2003
Down not across
24374_{8} Posts 
Quote:
Now, why is this particular public modulus of interest? I ask because it isn't included in my, admittedly small, collection of interesting moduli nor can I find it on the web with a quick and simple search. Last fiddled with by xilman on 20170920 at 17:44 Reason: Add last sentence 

20170920, 21:13  #21 
Feb 2017
Nowhere
4156_{10} Posts 
I've got some other questions:
1) Why does this procedure involve taking the gcd of three integers? 2) Why are the integers of the form a  b^p, for a prime p? (I can think of some possible reasons, but I'm not at all sure.) I was able to verify that your hex string does represent a 512bit integer that does divide the three integers in your second example. In decimal, this integer is 9943361511736887180525193238781951852048704466124378491895895799799940176852818360584496466538746226491733937270575629104317392858375709260953122655392891 I checked that it is composite, and it has no small factors. 
20170921, 02:54  #22 
Sep 2017
11000_{2} Posts 
Dear xilman sir.
this is a cryptoworks smartcards rsa string but new string and old same just plaintext change ciphertext same and exp change new is very big and mathematica show problem to start kindly help me to solve this issu please solve this string any other app like matlab or mapel maybe you solve this : (7580104959982914123117804044806461820154572036369549529405552162648856956231245030405896783337631871321017085933334306430501343909365379890910193903441(7601611438277968963930435339966375537762723788929138241505092335032216337024111944145650540579951639515460945444623092013993572866002842083492323809287290^17592186175489)); Z2:= (7580104959982914123117804044806461820154572036369549301773204651044654156328611994019678602790933052049997074737942147009504600337458372628655015658163(5472021051232020294637156058031796107019454396525172260491306567922450488302345750910648307191204110931670031994886144725045972546892458995859985546716414^17592186175489)); Z3:= (7580104959982914050609440727680305970398447676033232174897745114621599628756001756455762578505630805317234747401759098214730033873908508468766892578356(2716401471494295676405217606243925186946305783849093640906079739928627393562677984831598246598185728284424287135181309232467496805930321500988187816347957^17592186175489)); ToUpperCase[IntegerString[(GCD[Z1,Z2,Z3]),16]] this is new exp string 
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