numerator of function is prime

[Mohammed BOUAYOUN]

I defined a new function f(n)=sum(i=1,n,prime(i)/prime(i+1))
Example  
f(1)=2/3
f(2)=2/3 + 3/5
f(3)=2/3+3/5+5/7
f(4)=2/3+3/5+5/7+7/11

can anyone verify if numerator(pp(796)) is prime

thanks
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