20170520, 15:46  #12  
Nov 2016
23×97 Posts 
Quote:
Note: gcd(0, m) = m for all integer m, and gcd(1, m) = 1 for all integer m. Last fiddled with by sweety439 on 20170520 at 15:47 

20170520, 17:11  #13 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2^{2}×2,281 Posts 

20170521, 03:45  #14 
"Mike"
Aug 2002
2^{3}×31^{2} Posts 

20170521, 05:15  #15 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2^{2}·2,281 Posts 

20170521, 17:43  #16 
Nov 2016
23·97 Posts 
No, gcd(0, m) = m is true only for positive integer m.
Last fiddled with by sweety439 on 20170521 at 17:44 
20170521, 22:03  #17 
Aug 2006
31×191 Posts 

20170522, 14:29  #18 
Feb 2017
Nowhere
5·691 Posts 
Depends on the medium. Through a vacuum, it certainly does. Also through the air we breathe. But it takes a long, long time for the EM energy produced in the solar core to make its way through the interior of the sun, and out as sunshine. Sound waves travel through the interior of the sun much more quickly.
Last fiddled with by Dr Sardonicus on 20170522 at 14:30 
20170522, 18:00  #19  
Nov 2016
4267_{8} Posts 
Quote:


20170522, 18:05  #20  
Nov 2016
23×97 Posts 
Quote:
Last fiddled with by sweety439 on 20170522 at 18:06 

20191127, 09:36  #21 
Nov 2016
23·97 Posts 
Base 36 has only two unsolved family:
(4428*36^n+67)/5 (6480*36^n+821)/7 Base 40 has only two unsolved family: (13998*40^n+29)/13 (86*40^n+37)/3 
20191127, 09:39  #22  
Nov 2016
8B7_{16} Posts 
Quote:
(13998*40^12381+29)/13 Written in base 40, this number is Qa{U_{12380}}X This number is likely the secondlargest "base 40 minimal prime" 

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