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#include <stdio.h> main() { int n; int t; int c; int p; c = 0; n = 2; while (n < 5000) { t = 2; p = 1; while (t*t <= n) { if (n % t == 0) p = 0; t++; } if (p) { if (c && c % 10 == 0) printf("\n"); printf("%4d ", n); c++; } n++; } printf("\n"); }