I had never heard of a “prayer rope.”
Yeah same here until I started to buy some Eastern stuff. I inherited a Chalice and I wanted to get a nice Paten and Gospels Book to match it. The Easterners really make beautiful ones; I saw some Roman Catholic sellers have much inferior items for much higher prices.
Anyway just to share what I learnt with you, the story goes that Saint Pachomius the Great was making knots to count how many times he prayed but the devil kept untying it, so an angel showed him a special knot that the devil cannot untie made up of seven crosses. That is how the knot came about.
The Rosary in fact comes from the prayer rope (the story about Saint Dominic having gotten it from Mary apparently is just a legend). I read that in the East, they tended to pray the Our Father while in the West they tended to pray the Hail Mary. The Prayer Rope can come in different numbers of knots or beads (33, 50, 100, 150, etc.), but of course as you know, the Rosary has a set number meant to match the 150 psalms.
Prayer ropes are made by monks and the traditonal prayer is “Lord Jesus Christ, Son of God, have mercy on me, a sinner,” which is called the Jesus Prayer.
I have also read on CAF that when you recite the first part, “Lord Jesus Christ, Son of God,” you inhale. When you get to “have mercy on me, a sinner,” you exhale. Hard for me to do personally but I might just not be doing it right.
There is a set of prostrations that people can do with it but as I understand it, it isn’t recommended to do it without a spiritual director. I don’t know why but it would be fascinating to learn the reasoning.
I learnt how to make these and began to do it as a hobby, giving one as a gift to someone I pray for (I pray while I make each knot). It’s quite a task; it takes me over a minute to do each knot, and I also bought a lot of beads for dividers and tassels. I even have to drill the beads to get the holes big enough to fit the satin material through. But it’s worth the work because these are just so beautiful and it’s a nice expression of care that people appreciate.