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 Forum: In-Depth Adult Life Discussion   Topic: Anyone 50+?

GlennL
Posted: 31 Oct 2013, 11:17 pm 

Replies: 96
Views: 48,715
I am 56. I was originally diagnosed as autistic in the early 60's, but tried to live as a "normal" person most of my life. I remember vaguely special education in the 1st and possibly 2nd grade, then in a Group Home setting in the early 70s during my high school years (14 to 18, including my 1st sem...

 Forum: Computers, Math, Science, and Technology   Topic: UCLA mathematicians discover a 13-million-digit prime number

GlennL
Posted: 16 Jun 2009, 9:58 am 

Replies: 11
Views: 1,675
Strangely enough, there is. The number discovered, a Mersenne Prime (Mp), is directly associated with a Perfect Number (Pp) -- which is the sum of its divisors! The formula is: Pp = Mp(Mp+1)/2 = (2^p-1) * 2^(p-1) where 2^p-1 (and as a consequence, p) are both prime. The first four perfect numbers ar...
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