.between {
	display:		none;
}
.number {
	border:			1px solid grey;
	display:		block;
	float:			left;
	height:			42px;
	line-height:		42px;
	margin:			0 -1px -1px 0;
	text-align:		center;
	vertical-align:		middle;
	width:			42px;
}
.number.prime {
	background-color:	#6f6;
}