Code #1

Observations

66 numbers.

Let’s make pairs to see what we are working with

17 04 02 05 08 21 04 04 08 06 07 19 02 14 12 08 13 19 13 08 13 04 13 08 13 04 19 07 17 04 04 00 04

Numbers range from 00 to 25. Convert numbers to letters using a=0

RECFIVEEIGHTCOMINTNINENINETHREEAE

rec58comint993ae

This code doesn’t need to be decoded

You can sort of see the passcode format in there and a keyword.

Reverse the string

fdf7.63soul8.512v.25

We need to fix those numbers. Those dots are really divide signs

63/7=9 and 512/8=64

fdf79soul864v.25

Interpret the V as roman numeral 5. You will have

5.25 = 25/5 = 5

fdf79soul864 5 5

Convert those 5 back to roman numerals

fdf79soul864vv