Suppose your input is a $256$x$256$ greyscale $($one channel$)$ image and you use a convolutional layer with $100$ filters that are each $5$x$5.$ How many weights does this hidden layer have?

Suppose your input is a $256$x$256$ greyscale $($one channel$)$ image and you use a convolutional layer with $100$ filters that are each $5$x$5.$ How many weights does this hidden layer have?

$25$

$65536$

$2500$

$125$