Since Ancient Greek :

- Euclid had proved there are infinite primes.
- Sieve of Eratosthenes to enumerate the primes.
- Recent time 3 Mathematicians GPY attempted another Sieve method to find the
*bounded gap***(N)**of primes in infinity, but stuck at one critical step. - Dr. YiTang Zhang 张益唐 (1955 -) spent 7 years in solitude after failure in academic career, in 2013 during a 10-min walk at the deer backyard of his friend’s house, he found an Eureka solution for the GPY’s critical step: $latex boxed { epsilon = frac {1} {168}}&fg=aa0000&s=2 $ which gave the first historical
N) from an infinity large number to a limit of 70 million.**bounded Gap (**

Notes:

- Chinese love the number “8” ba which sounds like the word prosperity 发 fa (in Cantonese) . He could have instead used 160, so long as $latex epsilon $ is small.
- The
UltimateGoalof the Bounded…

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