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 Topological Sort 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 Knight Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka 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 Knight 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 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 Topological Sort 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 600th nstearns96 🇬🇧 496 130 2 Oct 2024 600th rollershutter 496 130 10 Jan 2025 600th Stockoh 🇫🇷 496 130 4 Jul 2025 604th jlangvand 496 141 15 Oct 2024 604th HumanoidCPU 496 141 7 Mar 2025 606th inverseLorentz 🇦🇺 492 131 7 Oct 2024 606th sciencejiho 492 131 11 Feb 2025 606th Jaydosu 492 131 11 Apr 2025 609th TheRealOhead 🇺🇸 490 131 1 Oct 2024 610th HumanoidCPU 488 145 5 Oct 2024 611th Mabeloid 🇳🇴 485 133 2 Oct 2024 611th Emutis 🇱🇹 485 133 4 Feb 2025 613th h-hh-hhh 🇺🇦 484 177 2 Nov 2024 614th Mabeloid 🇳🇴 483 145 2 Oct 2024 615th alphafalfa 477 92 8 Nov 2024 616th KatieLG 🇬🇧 477 120 1 Oct 2024 617th KatieLG 🇬🇧 476 108 13 Oct 2024 618th h-hh-hhh 🇺🇦 476 147 2 Nov 2024 619th mitzal 476 180 9 Feb 2025 620th sciencedjinn 474 136 8 Nov 2024 620th ihatethefrench 474 136 4 Jan 2025 622nd MiffOttah 472 150 6 Oct 2024 623rd kurkale6ka 470 137 16 Oct 2024 623rd 4ndyJ 🇬🇧 470 137 14 Nov 2024 623rd Mikey-Beep 🇬🇧 470 137 4 days ago 626th ejini6969 468 102 14 Jun 2025 627th scpchicken 🇵🇼 464 139 6 Oct 2024 628th NanduBC 460 140 1 Oct 2024 628th jmerle 🇳🇱 460 140 10 Jan 2025 628th RobertHoeh 460 140 3 Mar 2025 628th smilesformiles3 460 140 12 Jun 2025 628th artem-aramma 460 140 18 Jun 2025 633rd Yewzir 🇧🇪 460 171 26 Dec 2024 634th madex 🇩🇪 459 104 2 Oct 2024 635th FranklinJiaChen 457 141 2 Oct 2024 636th brimstonetrader 454 142 17 Oct 2024 636th codewrite 🇬🇧 454 142 5 May 2025 636th RobGLambert 454 142 8 Jun 2025 639th dokutan 451 63 26 Nov 2024 640th GeneralFabian 451 143 9 Dec 2024 640th CutSandstone 451 143 30 Jan 2025 640th kistlerf 🇨🇭 451 143 19 May 2025 643rd IISResetMe 449 104 27 Mar 2025 644th hiichbindermax 448 144 2 Oct 2024 644th mathisfun271 448 144 14 Oct 2024 644th bob-th 448 144 22 Oct 2024 647th varhammer 🇷🇺 448 223 23 Feb 2025 648th dokutan 445 109 19 Oct 2024 649th Flekay 🇩🇪 445 145 10 Jul 2025 650th grey0ut 444 105 11 Jan 2025 651st croc54 441 146 15 Dec 2024 652nd MyXoToD 🇩🇪 440 146 26 May 2025 653rd PyryL 🇫🇮 438 147 1 Mar 2025 654th mbittner20 435 148 13 Oct 2024 655th psaban 433 149 10 days ago 656th dokutan 431 130 17 Oct 2024 657th Mabeloid 🇳🇴 430 133 2 Oct 2024 658th jameswmccarty 430 150 5 Oct 2024 658th yousefalizadeh 430 150 23 Oct 2024 658th feherd 430 150 31 Oct 2024 658th TheZwierzLF 🇵🇱 430 150 17 May 2025 662nd adamnielson42 🇺🇸 424 152 6 Oct 2024 662nd voidgloom 424 152 22 Oct 2024 664th snoozingnewt 🇺🇸 418 137 27 Jan 2025 665th MeWhenI 🇻🇦 417 143 2 Oct 2024 666th FortuiteMan 416 155 16 Oct 2024 667th Maximizer02 413 201 1 Oct 2024 668th lhulinsky 411 157 21 Oct 2024 669th ThatAlo 408 158 9 Dec 2024 670th dieggsy 405 247 10 Oct 2024 671st Mabeloid 🇳🇴 404 159 12 Oct 2024 672nd CheeseCake628 🇳🇴 403 160 5 Nov 2024 672nd osNiko 🇧🇷 403 160 11 days ago 674th pres-abhisheksinha 400 161 8 Oct 2024 675th ibixina 398 162 13 Oct 2024 Prev 601–675 of 732 Next