Table[Prime[n],{n,1,100}]

{2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,277,281,283,293,307,311,313,317,331,337,347,349,353,359,367,373,379,383,389,397,401,409,419,421,431,433,439,443,449,457,461,463,467,479,487,491,499,503,509,521,523,541}

TableForm[Table[{10^n,PrimePi[10^n],Round[10^n/Log[10.^n]],PrimePi[10^n]/(10^n/Log[10.^n])},{n,3,12,3}],TableHeadings->{None,{"n","Π(n)","n/ln(n)","((Π (n))/(n/ln (n)))"}},TableAlignments->Right]