primesg.c running 
1 th prime is 2 
the 10th  prime is 29 
the 100th  prime is 541 
the 1000th  prime is 7919 
the 10000th  prime is 104729 
the 100000th  prime is 1299709 
the 200000th  prime is 2750159 
the 300000th  prime is 4256233 
the 400000th  prime is 5800079 
the 500000th  prime is 7368787 
500001 th prime is 7368791 
primesg.c finished, primef.h written