I have developed a very efficient and accurate method to find n-th prime number which is given in https://www.researchgate.net/publication/392595891_A_code_to_find_large_prime_numbers_using_Prime_number-Jump_number_Equation_PJE

It is based on a new method (Prime number-Jump number Equation, my invention). It is very fast, reliable, and accurate method without memory restriction.