I created a simple notation based on molar mass of the chemical substance.
I initially proposed the notation for the number named "hydrogen" to be 2^1 = 2, "helium" to be 2^4 = 16, "carbon" to be 2^12 = 4096, "oxygen" to be 2^16 = 65536, etc. With compounds such as "carbon dioxide", this would be equal to 2^44 = 17,592,186,044,416.
By the New Year's Day 2026, I decided to define the simple notation as follows:
M stands for the chemical substance used to define the molar mass rounded to the nearest integer as a part of the argument.
M[0] = 2^M
M[n][#] = (M[n])[#] (compute from the leftmost bracket first)
M[n+1] = M[n][n][n]...[n][n][n] with M copies of [n]'s if n > 0
Example:
Mg[3]
= 24[3] (magnesium has the molar mass of the most stable isotope (Mg-24) of 24)
= 24[2][2][2][2]...[2][2][2][2] with 24 [2]'s
The molar mass notation has a relationship with the binary bisector notation: For any non-negative integers n in M[n] where M is the specific element or compound rounded to the nearest integer, M[n] is in fact equal to M{n} in binary bisector notation where M is the molar mass of the specific element or compound rounded to the nearest integer.