20 characters, last two are capital letters. Probably a hint or keyword XM written in reverse.
So far no solution has been found.
***** Post updated thanks to @punchingcat
Spoiler
Reverse the string
XM5xpcy4vc5l6oekflqq
Convert Base32 to hex
BB3B778B1CA8BABF388A2AE1
Convert Hex to Base64
uzt3ixyour84iirh
Convert roman numerals to numbers
uzt39your842rh
Code #2
Observations
25 digits. You’ll need to spot the ranges.
Spoiler
Looking at the beginning of the string we can see a good decimal to Ascii format. The ending seems different, looks more like Hex. Let’s try to split things up
87 66 67 50 50 79843 33 39 36 64 68
Clearly the prefix is decimal to Ascii and the suffix is Hex to Ascii
WBC22 396dh
Now let’s try to search 79843 to see what comes up. Google tells us it’s the zipcode for Marfa, Texas.
wbc22marfa396dh
Invalid. Marfa also has it’s reversed keyword, Afram. Let’s try that
wbc22afram396dh
Code #3
Observations
114 characters, looks like hex. This cipher has been used before but it’s all about finding the right name !
Spoiler
114 can be divided by six which could mean RGB Hex colour codes. Split in groups of six and find the colour names
e5aa70
Fawn
2c1608
Zinnwaldyte brown
2c1608
Zinnwaldyte brown
50c878
Emerald
009000
Islamic green
000000
Black
00827f
Teal
645452
Wange
d71868
Dogwood rose
c2b280
Ecru
7f00ff
Violet
cd5700
Tenne
a2add0
Wild blue yonder
3f00ff
Electic ultra marine
009000
Islamic green
059033
North texas green
002fa7
International kline blue
ff7f00
Orange
86608e
French lilac
Get the first letter of each colour
fzzeibtwdevtweiniof
In the middle we can see the word dev, the only keyword that would fit is blackdev. That “black” colour should have been after “Wange”
