How can one find the limit as M approaches infinity of the ratio of the number of primes p to the number of primes q all less then M.
Where every p satisfy: p+42 is prime, and p+20 is prime.
And every q satisfy: q+2 is prime and q+18 is prime and q+44 is prime.
Which seems to converge to around 10.
How can one find the general case for this ratio?