37 is the 12th prime and 73 is the 21st prime
A=3, B=7, C=1, D=2
Ecin reversals in other bases (where MN denotes a twodigit base r number, i.e., r*M+N, [AB and BA] and where the twodigit ordinal numbers [CD and DC] are decimal):
base 14: 9D is the 34th prime [139]
and D9 is the 43rd prime [191]
A=9, B=D (13), C=3, D=4
base 23: BG is the 57th prime [269]
and GB is the 75th prime [379]
A=B (11), B=G (16), C=5, D=7
base 30: 11 is the 11th prime [31]
A=1, B=1, C=1, D=1
Edited on March 18, 2013, 12:07 pm

Posted by Dej Mar
on 20130318 09:15:41 