Show HN: SHAllenge – Compete to get the lowest hash

Comments

• lvxferre@mander.xyz ⁨1⁩ ⁨year⁩ ago

  OK… here’s some dumb bash shit.

  #!/bin/bash
  i=0; z=0
  while [[ $i -le 1000000000000 ]]; do
  	o=$(echo "lvxferre/Hello+Fediverse+$i" | sha256sum)
  	if [[ $o =~ ^($z) ]]; then
  		echo "$i: $o"
  		declare -g z="$z""0"
  		fi
  	if [[ $i == *000000 ]]; then
  		echo "$(expr $i / 1000000)M combinations tried..."
  		fi
  	i=$[$i+1]
  	done
  

  Feel free to use it. Just make sure to change lvxferre/Hello+Fediverse+ to something else.

  source

  • lvxferre@mander.xyz ⁨1⁩ ⁨year⁩ ago

    Update: so far my best string was lvxferre/Hello+Fediverse+2393194, yielding 0000006a 48…

    I also did some simple optimisations of the code. Basically “the least you do, the faster it’ll be”.

    i=7100000
    while true; do
    	o=$(echo "lvxferre/Hello+Fediverse+$i" | sha256sum)
    	if [[ "$o" == 00000* ]]; then echo "$o $i"; fi
    	if [[ "$i" == *00000 ]]; then echo "tried $i combinations..."; fi
    	i=$[$i+1]
    	done
    

    Now it’ll show results with more than five leading zeroes, and print a message every 100k tries (to resume later on).

    My machine is a potato, mind you. I don’t expect to get into the leaderboard. Still, I’m doing this as a bash exercise.

    source