NUMBER@1 , NUMBER@2 , NUMBER@3 , NUMBER@4 , NUMBER@5 , ... respectively , where -LRB- x -RRB- is the prime-counting function , that is , the number of primes less than or equal to x . The converse of this result is the definition of PERSON@1 primes , and the numbers NUMBER@1 , NUMBER@2 , NUMBER@3 , NUMBER@4 , NUMBER@5 are first few such primes .

NUMBER@1 , NUMBER@2 , NUMBER@3 , NUMBER@4 , NUMBER@5 , ... where -LRB- x -RRB- is the prime counting function . The prime counting function is the number of primes less than or equal to x . The numbers NUMBER@1 , NUMBER@2 , NUMBER@3 , NUMBER@4 , NUMBER@5 are first few PERSON@1 primes .
