Code: PU
P=100 (k=74=22 (mod 26) )
Formulae:
Number N is divisible by 26 iff 22*b+a = -4b+a is divisible by 26
Example:
Number N = 98 76 54 32 22 = 20 24 2 6 22 =
-4( 20 24 2 6)+22 =
-4(-4( 20 24 2+6)+22 =
-4(-4(-4(20 24+2)+6)+22 =
-4(-4(-4(-4*20+24)+2)+6)+22 =
-4(-4(-4* (-4)+2)+6)+22 =
-4(-4* 18+6)+22 =
-4* 12+22 = 0 (mod 26)
is divisible by 26.
Code: CR PD
P=25 (k=1)
Formulae:
Number N is divisible by 26 iff alternate sum of digits is divisible by 26
Example:
Number N = 68928 in decimal
Conversion to base P=25 is in previous post number 25
number is 4 10 7 3 with base 5^2 = 25
Formulae is: -4+10-7+3 = 2
so number N isn't divisible by 26
