The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 478th dillon-duncando 532 126 33ms 1 Dec 2021 478th alexjurkiewicz 🇦🇺 532 126 43ms 7 Nov 2023 478th epic-programmer-guy 532 126 20ms 1 Jan 2024 478th jameswmccarty 532 126 23ms 10 Jul 2024 485th OpesMentis 528 127 20ms 22 Mar 2018 485th bkshrader 528 127 15ms 29 Dec 2018 485th danwley 528 127 13ms 5 Jan 2019 485th ay2718 528 127 38ms 13 Aug 2019 485th Phanabani 🇺🇸 528 127 12ms 21 Oct 2020 485th potato-jackson 528 127 15ms 4 Mar 2021 485th LiamKrenn 528 127 14ms 25 Jul 2022 485th nmgetahun 528 127 61ms 9 Dec 2022 485th Ripick 528 127 14ms 1 Feb 2023 494th yokasuretsu 523 128 11ms 13 Apr 2018 494th mackenziem116 523 128 12ms 2 Aug 2018 494th ArturLange 523 128 19ms 5 Sep 2018 494th mvrkws 523 128 19ms 3 Dec 2018 494th matheusnervis 523 128 29ms 15 Jan 2019 494th artieleach 523 128 20ms 12 Dec 2020 494th hymanimy 523 128 26ms 23 Jul 2021 494th Trunksistor 🇫🇷 523 128 29ms 18 May 2022 494th AodhanDalton 523 128 13ms 2 Sep 2022 494th nayakrujul 523 128 16ms 3 Jan 2023 494th mbittner20 523 128 33ms 27 May 2023 494th dgambit 523 128 46ms 8 May 2024 494th Artemis21 🇬🇧 523 128 13ms 2 Jan 2025 494th ridingqwerty 🇺🇸 523 128 29ms 21 May 2025 494th tejapvk 523 128 11ms 19 Jun 2025 494th Code-Coder-coder 523 128 14ms 11 Oct 2025 494th madeforlosers 523 128 37ms 11 Nov 2025 511th djtuBIG-MaliceX 519 129 20ms 31 Jan 2018 511th evelyn-fu 519 129 20ms 15 Aug 2018 511th rjomabolla 519 129 15ms 3 Aug 2020 511th jackdonofrio 519 129 29ms 25 Sep 2020 511th TimLeffke 519 129 28ms 15 Aug 2022 511th Cynopolis 519 129 39ms 11 Oct 2023 511th bac0id 519 129 14ms 29 Jun 2024 518th omgardner 515 130 14ms 10 Jul 2019 518th kypi 515 130 49ms 18 Feb 2020 518th vonKrafft 515 130 16ms 26 Mar 2020 518th boxjelly 515 130 15ms 12 Feb 2021 518th TheSmilingTurtle 515 130 50ms 19 May 2022 518th AliceFord 515 130 13ms 2 Jun 2022 518th Wildst 515 130 21ms 2 Nov 2022 518th bobbysq 515 130 70ms 23 Jan 2023 518th JamesTadleyGreen 515 130 18ms 11 Apr 2024 527th ProtD 511 131 109ms 27 Feb 2018 527th ari-gutierrez 511 131 14ms 22 Oct 2018 527th tjtnorton 511 131 10ms 4 Dec 2018 527th skps2010 511 131 18ms 3 Jan 2019 527th jotslo 🇬🇧 511 131 13ms 11 Jul 2019 527th Guptacos 511 131 27ms 2 Aug 2020 527th Sudoaepothetic 511 131 31ms 5 Dec 2021 527th LogicalJoe 511 131 10ms 14 Mar 2023 527th Eugen-str 511 131 21ms 3 Nov 2023 527th mar-moraes 511 131 12ms 12 Feb 2024 527th wenbang24 511 131 12ms 6 Jul 2024 538th hdformat 508 132 11ms 8 Jun 2020 538th befoster 508 132 28ms 10 Apr 2021 538th martinnorling 🇸🇪 508 132 11ms 2 Feb 2022 538th PeterZaka 508 132 80ms 15 Jan 2023 538th damoc1es 508 132 13ms 16 Apr 2023 543rd axpepper 504 133 27ms 29 Sep 2018 543rd SurplusSineWaves 504 133 31ms 10 Jun 2019 543rd EB-Brown 504 133 55ms 24 Aug 2019 543rd ianpoe 504 133 41ms 20 Apr 2020 543rd Pena86 504 133 25ms 28 Feb 2021 543rd kenny14231 504 133 28ms 5 Aug 2022 543rd omri2001 504 133 21ms 22 Oct 2022 543rd GWStuart 504 133 28ms 21 Nov 2024 543rd RandGuy 504 133 9ms 27 Nov 2025 543rd Aquateraneal 🇺🇸 504 133 13ms 20 Feb 2026 553rd PossessedLego 500 134 171ms 12 May 2019 553rd derekthatcher 500 134 19ms 22 Sep 2020 553rd wrhm 500 134 30ms 13 Dec 2020 553rd sbr075 500 134 21ms 7 Dec 2021 553rd tails618 500 134 11ms 6 Dec 2022 558th sirrus233 496 135 13ms 7 Dec 2017 558th zuparnowa 496 135 19ms 23 Apr 2019 558th oriphi 496 135 34ms 16 Jun 2019 First Prev 481–560 of 813 Next Last
