Hi SoaringEagle,
This bit of info may be useful to you.
Page 104: FUTHARK: A HANDBOOK OF RUNE MAGIC
There are several "numbers of power" in both of these systems
on which the beginning vitki could concentrate. For the rune count,
the numbers 1 through 24 are all powerful, and imbue the formula
with the force of the rune of that number. Also, the use of any
twenty-four runes in an inscription provides a broad base of power
and invokes the force of the whole rune row into the formula. To a
twenty-four-fold rune count, the number eight and its multiples (and
indeed twenty-four and its multiples) may be added to maintain the
whole harmony of power while intensifying its force. The multiple of
the rune count also modifies the runic potency in subtle and
ingenious ways. These are common patterns in ancient inscriptions.
On the second level, that of the numerical total of the runes,
there are many possibilities and numbers of power, which direct the
runic force in specific directions and give them special magical
characteristics. Of course, the sums 1 through 24 indicate the sphere
where that particular rune is at work. Prime numbers are especially
powerful and express a tremendous amount of will. Whatever the
runic total might be, it is through its multiple factors that the root
force of the number is revealed. Multiples of three, and especially of
nine, are powerful in operations dealing with magical forces working
on many levels at once, including the earthly realm. Multiples of ten
are especially forceful when the intent is to cause a change in the
manifest world of Midhgardhr. Twelve and its multiples also are
potent in this regard but have a more prolonged and enduring effect.
The number thirteen and its multiples are the most universal
numbers of power. A vast number of runic inscriptions manifest this
numerological pattern. The number is indicative of universal potency
and contains the mystery of eihwaz as the world-tree (9) and the three
realms (3) in the ontological oneness of Ginnungagap (1). The
number by which the "master number" is multiplied further modifies
and directs the overall force of the formula according to its 'runic
nature.