20181210, 12:48  #1 
Mar 2018
1033_{8} Posts 
palindromic prime 111010111
A mathexchange user found that 111010111 divides ((2^33436631)*10^1006543+2^33436621), the concatenation of two consecutive Mersenne numbers!

20181210, 12:50  #2 
Mar 2018
7^{2}·11 Posts 
other factors
Somebody can find other factors of this number? Besides 691 and naturally 111010111
Last fiddled with by enzocreti on 20181210 at 12:51 
20181210, 13:33  #3 
Banned
"Luigi"
Aug 2002
Team Italia
3·1,619 Posts 

20181210, 15:00  #4 
Mar 2018
7^{2}×11 Posts 
factor it
just for fun and because i guess that the next factor is a 666666666...7 prime!

20181210, 15:27  #5 
Banned
"Luigi"
Aug 2002
Team Italia
1001011111001_{2} Posts 

20181210, 23:15  #6 
Aug 2006
5,987 Posts 

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