int n, k, p; n = 50; outputln "Number of primes:"; input n; k = 0; p = 2; while (k < n) if (p == 2) output " ", p; k = k+1; p = p+1; else int d, prime; prime = 1; d = 3; while (prime == 1 && d*d <= p) if (p % d == 0) prime = 0; break; endif d = d+2; endwhile if (prime == 1) output " ", p; k = k+1; if (k % 10 == 0) outputln; endif endif p = p+2; endif endwhile outputln; end