The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Emirp Numbers in Python in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 721st Zindu 409 164 9ms 6 Mar 2019 721st sambirnbaum1 409 164 13ms 5 Sep 2019 721st jjbvtk 409 164 13ms 8 Sep 2021 721st fl3ur1nestimable 409 164 9ms 2 Apr 2022 725th atazzam 🇺🇸 406 165 13ms 6 Mar 2022 725th zstephe 406 165 32ms 6 Dec 2022 727th Loag 404 166 15ms 7 Sep 2024 727th Akilles1 404 166 52ms 10 Apr 2025 729th EnisEfe0 401 167 19ms 18 May 2025 730th jerkmuffin 396 169 12ms 5 Aug 2018 730th confy 396 169 19ms 25 Oct 2020 730th Mr-McChicken 396 169 28ms 16 Oct 2023 733rd dave-ck 394 170 29ms 3 Mar 2018 733rd Kiwiatomik 394 170 11ms 28 Jul 2019 735th dddthedark 390 172 13ms 22 Jun 2019 736th Santiago-Dubov 387 173 12ms 12 Jul 2019 736th scottJsonar 387 173 10ms 28 Nov 2019 736th jrbud 387 173 11ms 9 Jan 2024 739th achow0 383 175 15ms 5 Aug 2020 740th StoverGitHub 381 176 12ms 15 Jun 2022 740th gelvetica 381 176 12ms 17 Nov 2024 742nd kpasc 379 177 13ms 22 Dec 2017 742nd Stealth-py 379 177 66ms 10 Jul 2019 742nd j3mak 379 177 33ms 17 Jan 2024 745th sanssaraf 376 178 12ms 2 May 2020 746th kittrz9 374 179 9ms 7 Dec 2017 746th aw-west 374 179 10ms 8 Oct 2018 746th SnehanjanChatterjee 374 179 10ms 20 Dec 2018 746th breeezi 374 179 11ms 7 Feb 2020 746th uBagout 374 179 10ms 6 Oct 2020 746th KatieLG-Transpiler 🇬🇧 374 179 9ms 23 Jun 2022 746th zt14427 374 179 10ms 18 Nov 2023 746th kasarino 374 179 10ms 6 Feb 2026 754th dcure73 372 180 12ms 7 Jun 2019 755th lovernj 368 182 10ms 28 Jan 2022 755th IrisWintermute 368 182 24ms 31 Jul 2024 757th newc0m 364 184 12ms 12 Apr 2019 757th dens558 364 184 22ms 25 May 2019 757th valgardg 🇮🇸 364 184 19ms 6 Sep 2021 760th Frowny 360 186 14ms 1 Dec 2021 761st chriscconte 356 188 10ms 16 Apr 2019 762nd markbyrne 354 189 15ms 22 Oct 2020 763rd wadefletch 353 190 33ms 2 Oct 2019 763rd jmmographer 353 190 14ms 22 Oct 2023 763rd Leon-Degel-Koehn 353 190 27ms 21 May 2024 766th hotmanga 351 191 9ms 27 Oct 2023 766th xbxbxb007 351 191 10ms 10 Jan 2024 768th joakimalsbjergdich 349 192 10ms 18 Jan 2019 768th opsullivan85 349 192 10ms 2 Jun 2019 770th kaushalrathi24 344 195 11ms 23 Apr 2024 771st DylanGodfrey 338 198 13ms 5 Jun 2018 771st uncertaain 338 198 12ms 14 Dec 2024 773rd codewrite 🇬🇧 324 207 10ms 4 Jul 2025 774th Secozzi 319 210 16ms 1 Mar 2021 775th scientizt 316 212 9ms 25 Jan 2019 776th juliantamayo-py 315 213 18ms 20 Oct 2024 777th rajlath 312 215 11ms 8 Apr 2018 777th lundas 312 215 25ms 25 Dec 2018 777th StronkCheese 🇺🇸 312 215 14ms 11 Sep 2023 780th muser-logiccpu 🇺🇦 310 216 10ms 16 Aug 2025 781st jotham 303 221 27ms 15 Jul 2022 782nd Nibamot 298 225 13ms 22 Dec 2021 783rd vlhommeau 293 229 35ms 12 Oct 2018 784th noahdorsch 285 235 21ms 7 Mar 2025 785th puzzleninja 284 236 11ms 18 Jul 2019 786th joe0400 282 238 55ms 23 Sep 2019 787th ablicq 272 246 13ms 25 Dec 2018 787th ErikvdVen 272 246 17ms 30 Jul 2019 789th joshvd 264 254 12ms 31 Aug 2019 790th thomashastings 263 255 23ms 15 Apr 2021 791st ntsd 🇹🇭 262 256 10ms 18 Oct 2019 792nd Unknownuserfrommars 260 258 10ms 22 Nov 2024 793rd ericmarkmartin 245 273 11ms 11 Jul 2019 794th lovepeacejoy404 238 281 15ms 4 Feb 2019 795th clodalala 232 289 12ms 12 Nov 2019 796th dahappy1989 222 302 34ms 5 Nov 2023 797th Noooiz 218 308 33ms 30 Dec 2018 798th eje24 213 314 11ms 27 Jul 2020 799th returnitynet 210 319 32ms 2 Jan 2025 800th gregfromstl 209 320 37ms 16 Oct 2018 First Prev 721–800 of 814 Next Last
