Card Number Validation in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Morse Decoder Morse Encoder 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Morse Decoder Morse Encoder 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 526th emgordon154 546 52 3 Nov 2024 527th elgan65536 546 118 2 Oct 2024 527th logvp 546 118 6 Oct 2024 527th ahmetdemirag 🇨🇾 546 118 6 Feb 2025 530th mousetail 🇳🇱 546 128 3 Oct 2024 531st zakariamouhid 544 118 1 Oct 2024 532nd xyangst 543 171 1 Oct 2024 533rd jtaxen 541 119 21 Oct 2024 533rd psbpsbp 541 119 19 Dec 2024 533rd klixel 🇨🇦 541 119 9 Apr 2025 536th najs91 540 131 15 Oct 2024 536th bac0id 540 131 9 Jan 2025 538th eranws 539 119 23 Dec 2024 539th TaserTheFox 🇺🇸 537 120 8 Oct 2024 539th yokasuretsu 537 120 26 Jan 2025 539th Troon 537 120 17 Feb 2025 542nd Sciman101 536 147 26 Mar 2025 543rd msbranicky 531 175 13 Dec 2024 544th deancureton 530 121 30 Dec 2024 545th janAkali 🇷🇺 529 167 8 Oct 2024 546th chartung17 528 122 24 Mar 2025 547th msbranicky 527 126 9 Jan 2025 548th CaedenHarper 🇨🇦 524 109 9 Oct 2024 549th msbranicky 524 123 3 Oct 2024 549th bobbysq 524 123 5 Oct 2024 549th wuzekai518 524 123 8 Oct 2024 549th vhoulbreque 🇫🇷 524 123 4 Feb 2025 553rd galloj 🇨🇿 522 112 4 Oct 2024 554th NotEvenIndian 519 124 22 Oct 2024 554th ridingqwerty 🇺🇸 519 124 16 Jan 2025 556th bnic24 515 125 3 Oct 2024 556th adoxography 515 125 22 Oct 2024 558th sidok 514 109 13 Nov 2024 559th nephila-nacrea 🇬🇧 509 77 2 Oct 2024 560th dokutan 509 143 19 Oct 2024 561st KatieLG 🇬🇧 509 146 2 Oct 2024 562nd CatsAreFluffy 507 127 30 Oct 2024 562nd WillowWispy 507 127 25 May 2025 564th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 565th KatieLG 🇬🇧 506 140 1 Oct 2024 566th msbranicky 505 138 3 Oct 2024 567th lelbal 503 128 2 Oct 2024 567th Lv0Sys 🇵🇱 503 128 20 days ago 569th albanian-laundromat 499 88 3 days ago 570th madex 🇩🇪 499 129 2 Oct 2024 570th RedzGoose 🇦🇺 499 129 15 Oct 2024 570th calebaitken 499 129 11 Apr 2025 573rd MeWhenI 🇻🇦 499 149 4 Oct 2024 574th Europe2048 495 130 2 Oct 2024 574th nstearns96 🇬🇧 495 130 2 Oct 2024 574th rollershutter 495 130 10 Jan 2025 574th Stockoh 🇫🇷 495 130 45 hours ago 578th jlangvand 495 141 15 Oct 2024 578th HumanoidCPU 495 141 7 Mar 2025 580th inverseLorentz 🇦🇺 492 131 7 Oct 2024 580th sciencejiho 492 131 11 Feb 2025 580th Jaydosu 492 131 11 Apr 2025 583rd TheRealOhead 🇺🇸 490 131 1 Oct 2024 584th HumanoidCPU 488 145 5 Oct 2024 585th Mabeloid 🇳🇴 484 133 2 Oct 2024 585th Emutis 🇱🇹 484 133 4 Feb 2025 587th h-hh-hhh 🇺🇦 484 177 2 Nov 2024 588th Mabeloid 🇳🇴 482 145 2 Oct 2024 589th alphafalfa 477 92 8 Nov 2024 590th KatieLG 🇬🇧 476 108 13 Oct 2024 591st KatieLG 🇬🇧 476 120 1 Oct 2024 592nd mitzal 476 180 9 Feb 2025 593rd h-hh-hhh 🇺🇦 475 147 2 Nov 2024 594th sciencedjinn 473 136 8 Nov 2024 594th ihatethefrench 473 136 4 Jan 2025 596th MiffOttah 472 150 6 Oct 2024 597th Maximizer02 472 201 1 Oct 2024 598th kurkale6ka 470 137 16 Oct 2024 598th 4ndyJ 🇬🇧 470 137 14 Nov 2024 600th ejini6969 467 102 22 days ago Prev 526–600 of 698 Next