20200721, 14:49  #23 
Nov 2016
2,347 Posts 
at n=12065

20200930, 00:59  #24  
Jan 2020
170_{8} Posts 
Quote:
Ӿ,ӾƐ3,855 12,531,515 17,476,435 20,Ӿ28041 21,Ӿ46,Ɛ85 23,7ӾƐ,125 Last fiddled with by tuckerkao on 20200930 at 01:06 

20200930, 02:20  #25 
Romulan Interpreter
Jun 2011
Thailand
2×5×883 Posts 
I can do better: when written in base 2, all mersenne prime's exponents end in 1.

20200930, 02:28  #26 
Feb 2017
Nowhere
2·5^{2}·71 Posts 

20200930, 03:12  #27  
Nov 2016
2,347 Posts 
Quote:
Also, these project is for the nearrepunit and quasirepunit primes in dozenal, not for the Mersenne Prime exponents in dozenal. 

20200930, 03:13  #28 
Nov 2016
2,347 Posts 

20200930, 03:35  #29  
Jan 2020
2^{3}·3·5 Posts 
Quote:
For example 9 dozen 1 and 9 dozen 5 are both primes. Quote:
Base 4 will give more insights as whether the prime exponents turn out to be the 1 ender or the 3 ender. Last fiddled with by tuckerkao on 20200930 at 03:51 

20200930, 04:46  #30  
Nov 2016
2,347 Posts 
Quote:
All Mersenne primes > 3 end with 7, and all Mersenne primes > 7 end with either 27 or X7 (27 and X7 are the only twodigit Mersenne primes). Also, Mersenne exponents end with E are fewer than Mersenne exponents end with 1, 5, or 7, since if p end with E and 2p+1 is also prime (e.g. p = E, 1E, 6E, XE), then Mp is divisible by 2p+1, thus composite. Last fiddled with by sweety439 on 20200930 at 04:49 

20200930, 04:50  #31 
Romulan Interpreter
Jun 2011
Thailand
8830_{10} Posts 

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