docs: protected static void statistics(int from, int to) {
  	// check that primes contain no accidental errors
  	for (int i=0; i<primeCapacities.length-1; i++) {
  		if (primeCapacities[i] >= primeCapacities[i+1]) throw new RuntimeException("primes are unsorted or contain duplicates; detected at "+i+"@"+primeCapacities[i]);
  	}
  	
  	double accDeviation = 0.0;
  	double maxDeviation = - 1.0;
  
  	for (int i=from; i<=to; i++) {
  		int primeCapacity = nextPrime(i);
  		//System.out.println(primeCapacity);
  		double deviation = (primeCapacity - i) / (double)i;
  		
  		if (deviation > maxDeviation) {
  			maxDeviation = deviation;
  			System.out.println("new maxdev @"+i+"@dev="+maxDeviation);
  		}
  
  		accDeviation += deviation;
  	}
  	long width = 1 + (long)to - (long)from;
  	
  	double meanDeviation = accDeviation/width;
  	System.out.println("Statistics for ["+ from + ","+to+"] are as follows");
  	System.out.println("meanDeviation = "+(float)meanDeviation*100+" %");
  	System.out.println("maxDeviation = "+(float)maxDeviation*100+" %");
  }