Home > Numbers
Special primes (Posted on 20120212) 

There are two primes, both below 100, that evenly divide the sum of the primes less than themselves.
Find those two primes.
The only other such prime below 2,000,000 is M, the nth prime.
Find M and n.

Submitted by Ady TZIDON

Rating: 5.0000 (1 votes)


Solution:

(Hide)

5 AND 71  for the first part  .As for the second part, 369,119 is the 31,464 th prime 
Comments: (
You must be logged in to post comments.)


Please log in:
Forums (0)
Newest Problems
Random Problem
FAQ 
About This Site
Site Statistics
New Comments (19)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On
Chatterbox:
