Alert! There is an error on the internet. The source I used for Javascript mantissa size was wrong. It said 53 bits, I knocked one off to avoid the addition ove

Alert! There is an error on the internet. The source I used for Javascript mantissa size was wrong. It said 53 bits, I knocked one off to avoid the addition overflow, but that source must have counted the sign bit. IEEE doubles only have a 52 bit mantissa, so you need to keep that array under 2^51 elements. Call it 2 quadrillion to be safe.